Staging: otus : checkpatch.pl cleanup for some more .c files

Second lot of checkpatch.pl error and warning fixes for .c files of
otus driver in staging tree.
(Externs would be removed in a seperate patch)

Signed-off-by: Mithlesh Thukral <mithlesh@linsyssoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>