media: rc/ite-cir: replace spin_lock_irqsave by spin_lock in hard IRQ

It is redundant to do irqsave and irqrestore in hardIRQ context.

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