usb: chipidea: udc: Fix incorrectly documented function 'hw_port_is_high_speed()'

Fixes the following W=1 kernel build warning(s):

 drivers/usb/chipidea/udc.c:247: warning: expecting prototype for hw_is_port_high_speed(). Prototype was for hw_port_is_high_speed() instead

Cc: Peter Chen <peter.chen@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Acked-by: NPeter Chen <peter.chen@kernel.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20210526130037.856068-17-lee.jones@linaro.orgSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/chipidea/udc.c

@@ -238,7 +238,7 @@ static int hw_ep_set_halt(struct ci_hdrc *ci, int num, int dir, int value)
 }
 
 /**
- * hw_is_port_high_speed: test if port is high speed
+ * hw_port_is_high_speed: test if port is high speed
  * @ci: the controller
  *
  * This function returns true if high speed port