leds-pca955x: Remove the unused function pca95xx_num_led_regs()

The function pca95xx_num_led_regs() is defined in the leds-pca955x.c
file, but not called elsewhere, so delete this unused function.

drivers/leds/leds-pca955x.c:149:19: warning: unused function 'pca95xx_num_led_regs'.

Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=2411Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>

drivers/leds/leds-pca955x.c

@@ -145,12 +145,6 @@ static inline int pca95xx_num_input_regs(int bits)
 	return (bits + 7) / 8;
 }
 
-/* 4 bits per LED selector register */
-static inline int pca95xx_num_led_regs(int bits)
-{
-	return (bits + 3)  / 4;
-}
-
 /*
  * Return an LED selector register value based on an existing one, with
  * the appropriate 2-bit state value set for the given LED number (0-3).