[media] staging: lirc: remove return void function

This patch fix checkpath "WARNING: void function return statements are not generally useful".
The removed return were useless in that case.

Signed-off-by: Raphaël Poggi <poggi.raph@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --cc drivers/staging/media/lirc/lirc_imon.c
Simple merge