media: atomisp: fix code style issues

Fix warnings and errors generated after running checkpatch.pl on pci/sh_css_firmware.c.

Signed-off-by: Rohit K Bharadwaj <bharadwaj.rohit8@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>