regulator: max8649: Remove unused check_range() function

This driver has been converted to use regulator_map_voltage_linear and
set_voltage_sel now. regulator_map_voltage_linear will check the the voltage
falls within specified range. The check_range() function is not used, remove it.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

drivers/regulator/max8649.c

@@ -60,16 +60,6 @@ struct max8649_regulator_info {
 	unsigned	ramp_down:1;
 };
 
-/* I2C operations */
-
-static inline int check_range(int min_uV, int max_uV)
-{
-	if ((min_uV < MAX8649_DCDC_VMIN) || (max_uV > MAX8649_DCDC_VMAX)
-		|| (min_uV > max_uV))
-		return -EINVAL;
-	return 0;
-}
-
 /* EN_PD means pulldown on EN input */
 static int max8649_enable(struct regulator_dev *rdev)
 {