x86, VisWS: turn into generic arch, eliminate include/asm-x86/mach-visws/setup_arch.h

use the generic version of setup_arch.h - it's the same.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

include/asm-x86/mach-visws/setup_arch.h

-/* Hook to call BIOS initialisation function */
-
-/* no action for visws */
+#include "../mach-default/setup_arch.h"