media: ttpci: coding style fixes: miscellaneous

This patch fixes the following checkpatch warnings:

WARNING:RETURN_VOID: void function return statements are not generally useful
WARNING:TRAILING_SEMICOLON: macros should not use a trailing semicolon

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