[media] coda: request BIT processor interrupt by name

Request the main coda interrupt using its name, "bit", if available.
Fall back to requesting the first interrupt for backwards compatibility.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>