Staging: vt6655: Replace C99 comments in rf.h and rf.c.

This patch replaces C99 comments in rf.h and rf.c, with
C89 comments, fixing the checkpatch.pl errors.

Signed-off-by: Nicholas Parkanyi <n.parkanyi@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>