media: av7110: coding style fixes: miscellaneous

This patch fixes the following checkpatch warnings:

WARNING:OOM_MESSAGE: Possible unnecessary 'out of memory' message
CHECK:MACRO_ARG_REUSE: Macro argument reuse 'fe_func' - possible side-effects?

The MACRO_ARG_REUSE isn't really fixed but marked as intentional.
The comment is visible in the checkpatch warning.

Signed-off-by: Stefan Herdler <herdler@nurfuerspam.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>