Staging: vt6655: comment after statement formatting

This patch makes the formatting of the comments in mac.h more
consistent.

* Where a comment follows a statement, it is separated by a single
  space.
Signed-off-by: Emrys Bayliss <emrys@paradise.net.nz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>