the correct RTC setting for powerpc/Macintosh - but I think now the default
will not work for the rs6k - but Mac hardware is in wider use AND we need
to fix the kernel in this broken RTC area ...
git-svn-id: http://www.rocklinux.org/svn/rock-linux/trunk@1398 c5f82cb5-29bc-0310-9cd0-bff59a50e3bc