airo_cs: checkpatch.pl cleanups

Hopefully nothing controversial here, since the driver hasn't been touched in a while!

Before: 36 errors, 6 warnings, 482 lines checked
After:  0 errors, 3 warnings, 485 lines checked

This was nearly all trailing whitespace, * and parenthesis spacing, and code indent changes.

md5sum of object file before and after are identical.

Signed-off-by: John Daiker <daikerjohn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>