leds: lm3642: Return proper error in lm3642_[torch|strobe]_pin_store error paths

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: G.Shark Jeong <gshark.jeong@gmail.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
1 file changed