backlight: lcd: Do not include <linux/fb.h> in lcd header

With the exception of fb_notifier_callback(), none of the lcd code
uses fbdev; especially not the lcd drivers. Remove the include
statement for <linux/fb.h> from the public lcd header.

v2:
- fix typos in commit description

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Link: https://lore.kernel.org/r/20240906075439.98476-29-tzimmermann@suse.de
Signed-off-by: Lee Jones <lee@kernel.org>

Author: Thomas Zimmermann

include/linux/lcd.h

@@ -12,7 +12,6 @@
 #include <linux/device.h>
 #include <linux/mutex.h>
 #include <linux/notifier.h>
-#include <linux/fb.h>
 
 #define LCD_POWER_ON			(0)
 #define LCD_POWER_REDUCED		(1) // deprecated; don't use in new code