media: usb: cpia2: Fixed Coding Style issues

Fixed all the Coding style issues generated by checkpatch.pl.
The changes made considering the --strict option.

Signed-off-by: Piyush Thange <pthange19@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>