V4L/DVB: media/IR/imon: precendence issue: ! vs ==

The original condition is always false because ! has higher precedence
than == and neither 0 nor 1 is equal to IMON_DISPLAY_TYPE_VGA.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>