[media] coda: remove superfluous error message on devm_kzalloc failure

When devm_kzalloc causes an OOM condition, this is already reported by
the MM subsystem.

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