V4L/DVB: IR/imon: clean up usage of bools

There was a mix of 0/1 and false/true. Pick one convention and stick
with it (I picked false/true).

Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>