staging: rts5208: fix comment blocks style in rtsx.h

This patch fixes the following checkpatch.pl warning in rtsx.h:
WARNING: Block comments use a trailing */ on a separate line

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>