[BACKPORT][5.8-rc1] drivers: cdrom: fix all errors reported by checkpatch

This fixes all errors that scripts/checkpatch.pl
reports about drivers/cdrom/*.c and a lot of warnings
as well. I skipped warnings that I don't know whether
fixing them will break anything.

Before:
drivers/cdrom/cdrom.c:
    total: 118 errors, 126 warnings, 3794 lines checked
drivers/cdrom/gdrom.c:
    total: 0 errors, 16 warnings, 873 lines checked

After:
drivers/cdrom/cdrom.c:
    total: 0 errors, 38 warnings, 3866 lines checked
drivers/cdrom/gdrom.c:
    total: 0 errors, 3 warnings, 882 lines checked

Test: scripts/checkpatch.pl --file drivers/cdrom/*.c
Test: make drivers/cdrom/cdrom.o
Test: make CONFIG_GDROM=y drivers/cdrom/gdrom.o # partial
Signed-off-by: Simao Gomes Viana <[email protected]>

Author: xdevs23