Staging: vt6655: Checkpatch fix: lines longer than 80 columns

This patch fixes the following checkpatch.pl errors in mac.h:
WARNING: line over 80 characters

Signed-off-by: Emrys Bayliss <emrys@paradise.net.nz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>