[media] staging:media:lirc Remove the extra braces in if statement of lirc_imon

This patche removes the extra braces found in
drivers/staging/media/lirc/lirc_imon.c to fix the warning thrown by
checkpatch.pl

Signed-off-by: Pradheep Shrinivasan <pradheep.sh@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>