backlight: sky81452: Remove unneeded use of IS_ERR_VALUE() macro
backlight: sky81452: Remove unneeded use of IS_ERR_VALUE() macro

IS_ERR_VALUE() makes sense only *if* there could be valid values in
negative error range.

Signed-off-by: Axel Lin <b6ffd6973e972cb999e8e535ab74da7fee0c035f@ingics.com>
Signed-off-by: Lee Jones <630e34333487a351a857f6b705e04d30b37c1629@linaro.org>

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