gpio: gpio-sama5d2-piobu: Demote all kerneldoc headers to basic comment blocks

No attempt has been made to provide proper descriptions for each of
the function arguments throughout the file.  Simply demote all
kerneldoc headers to basic function headers.

Fixes the following W=1 kernel build warnings:

 drivers/gpio/gpio-sama5d2-piobu.c:59: warning: Function parameter or member 'chip' not described in 'sama5d2_piobu_setup_pin'
 drivers/gpio/gpio-sama5d2-piobu.c:59: warning: Function parameter or member 'pin' not described in 'sama5d2_piobu_setup_pin'
 drivers/gpio/gpio-sama5d2-piobu.c:81: warning: Function parameter or member 'chip' not described in 'sama5d2_piobu_write_value'
 drivers/gpio/gpio-sama5d2-piobu.c:81: warning: Function parameter or member 'pin' not described in 'sama5d2_piobu_write_value'
 drivers/gpio/gpio-sama5d2-piobu.c:81: warning: Function parameter or member 'mask' not described in 'sama5d2_piobu_write_value'
 drivers/gpio/gpio-sama5d2-piobu.c:81: warning: Function parameter or member 'value' not described in 'sama5d2_piobu_write_value'
 drivers/gpio/gpio-sama5d2-piobu.c:97: warning: Function parameter or member 'chip' not described in 'sama5d2_piobu_read_value'
 drivers/gpio/gpio-sama5d2-piobu.c:97: warning: Function parameter or member 'pin' not described in 'sama5d2_piobu_read_value'
 drivers/gpio/gpio-sama5d2-piobu.c:97: warning: Function parameter or member 'mask' not described in 'sama5d2_piobu_read_value'
 drivers/gpio/gpio-sama5d2-piobu.c:116: warning: Function parameter or member 'chip' not described in 'sama5d2_piobu_get_direction'
 drivers/gpio/gpio-sama5d2-piobu.c:116: warning: Function parameter or member 'pin' not described in 'sama5d2_piobu_get_direction'
 drivers/gpio/gpio-sama5d2-piobu.c:131: warning: Function parameter or member 'chip' not described in 'sama5d2_piobu_direction_input'
 drivers/gpio/gpio-sama5d2-piobu.c:131: warning: Function parameter or member 'pin' not described in 'sama5d2_piobu_direction_input'
 drivers/gpio/gpio-sama5d2-piobu.c:140: warning: Function parameter or member 'chip' not described in 'sama5d2_piobu_direction_output'
 drivers/gpio/gpio-sama5d2-piobu.c:140: warning: Function parameter or member 'pin' not described in 'sama5d2_piobu_direction_output'
 drivers/gpio/gpio-sama5d2-piobu.c:140: warning: Function parameter or member 'value' not described in 'sama5d2_piobu_direction_output'
 drivers/gpio/gpio-sama5d2-piobu.c:154: warning: Function parameter or member 'chip' not described in 'sama5d2_piobu_get'
 drivers/gpio/gpio-sama5d2-piobu.c:154: warning: Function parameter or member 'pin' not described in 'sama5d2_piobu_get'
 drivers/gpio/gpio-sama5d2-piobu.c:174: warning: Function parameter or member 'chip' not described in 'sama5d2_piobu_set'
 drivers/gpio/gpio-sama5d2-piobu.c:174: warning: Function parameter or member 'pin' not described in 'sama5d2_piobu_set'
 drivers/gpio/gpio-sama5d2-piobu.c:174: warning: Function parameter or member 'value' not described in 'sama5d2_piobu_set'
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Acked-by: NLudovic Desroches <ludovic.desroches@microchip.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: Andrei Stefanescu <andrei.stefanescu@microchip.com>
Link: https://lore.kernel.org/r/20200630133345.2232932-6-lee.jones@linaro.orgSigned-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-sama5d2-piobu.c

@@ -49,7 +49,7 @@ struct sama5d2_piobu {
 	struct regmap *regmap;
 };
 
-/**
+/*
  * sama5d2_piobu_setup_pin() - prepares a pin for set_direction call
  *
  * Do not consider pin for tamper detection (normal and backup modes)
@@ -73,7 +73,7 @@ static int sama5d2_piobu_setup_pin(struct gpio_chip *chip, unsigned int pin)
 	return regmap_update_bits(piobu->regmap, PIOBU_WKPR, mask, 0);
 }
 
-/**
+/*
  * sama5d2_piobu_write_value() - writes value & mask at the pin's PIOBU register
  */
 static int sama5d2_piobu_write_value(struct gpio_chip *chip, unsigned int pin,
@@ -88,7 +88,7 @@ static int sama5d2_piobu_write_value(struct gpio_chip *chip, unsigned int pin,
 	return regmap_update_bits(piobu->regmap, reg, mask, value);
 }
 
-/**
+/*
  * sama5d2_piobu_read_value() - read the value with masking from the pin's PIOBU
  *			      register
  */
@@ -108,7 +108,7 @@ static int sama5d2_piobu_read_value(struct gpio_chip *chip, unsigned int pin,
 	return val & mask;
 }
 
-/**
+/*
  * sama5d2_piobu_get_direction() - gpiochip get_direction
  */
 static int sama5d2_piobu_get_direction(struct gpio_chip *chip,
@@ -123,7 +123,7 @@ static int sama5d2_piobu_get_direction(struct gpio_chip *chip,
 				   GPIO_LINE_DIRECTION_OUT;
 }
 
-/**
+/*
  * sama5d2_piobu_direction_input() - gpiochip direction_input
  */
 static int sama5d2_piobu_direction_input(struct gpio_chip *chip,
@@ -132,7 +132,7 @@ static int sama5d2_piobu_direction_input(struct gpio_chip *chip,
 	return sama5d2_piobu_write_value(chip, pin, PIOBU_DIRECTION, PIOBU_IN);
 }
 
-/**
+/*
  * sama5d2_piobu_direction_output() - gpiochip direction_output
  */
 static int sama5d2_piobu_direction_output(struct gpio_chip *chip,
@@ -147,7 +147,7 @@ static int sama5d2_piobu_direction_output(struct gpio_chip *chip,
 					 val);
 }
 
-/**
+/*
  * sama5d2_piobu_get() - gpiochip get
  */
 static int sama5d2_piobu_get(struct gpio_chip *chip, unsigned int pin)
@@ -166,7 +166,7 @@ static int sama5d2_piobu_get(struct gpio_chip *chip, unsigned int pin)
 	return !!ret;
 }
 
-/**
+/*
  * sama5d2_piobu_set() - gpiochip set
  */
 static void sama5d2_piobu_set(struct gpio_chip *chip, unsigned int pin,