staging: vchiq_arm: Fixing code style of comments

This removes checkpatch.pl warnings:

WARNING: Block comments use a trailing */ on a separate line
WARNING: Block comments should align the * on each line
WARNING: Block comments use * on subsequent lines

Signed-off-by: Mikhail Shvetsov <lameli67@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>