leds: Don't allow brightness values greater than max_brightness
leds: Don't allow brightness values greater than max_brightness

Since commit 4d71a4a12b13 ("leds: Add support for setting brightness in
a synchronous way") the value passed to brightness_set() is no longer
limited to max_brightness and can be different from the internally saved
brightness value.

Signed-off-by: Gabriele Mazzotta <e12f25739e09c234763987bb85389043078b2996@gmail.com>
Signed-off-by: Bryan Wu <956b36c0f472d2edb239225c10f7e4411d1efbb9@gmail.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs