media: iguanair: rc drivers no longer need to do locking

Since commit 4957133f ("media: lirc: improve locking"), drivers
do not need to do any of their own locking.

During suspend and resume, no processes are running so no locking is
needed.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>