Staging: otus: fix style issues in zdusb.c

This is a patch to zdusb.c that fixes whitespace,
C99 comment, and other style issues found by the
checkpatch.pl tool

Signed-off-by: Scott Kidder <scott.kidder11@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>