Use of devm_request_irq simplifies error unwinding and as
free_irq was the last user of driver remove function,
remove it too.
Signed-off-by: NLadislav Michl <ladis@linux-mips.org>
Signed-off-by: NSean Young <sean@mess.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>