[media] lirc_zilog: Fix unbalanced braces around if/else

Fix all checkpatch reported issues for:

 * CHECK: "braces {} should be used on all arms of this statement".
 * CHECK: "Unbalanced braces around else statement".

Make sure all if/else statements are balanced in terms of braces. Most
cases in code are, but a few were left unbalanced, so put them all
consistent with the recommended style.

Signed-off-by: Ricardo Silva <rjpdasilva@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>