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

This patch fixes lines longer than 80 columns in mac.c.
5 lines longer than 80 columns remain for the sake of readability.

Signed-off-by: Guillaume Brogi <gui-gui@netcourrier.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>