x86, VisWS: do not allow VisWS for Voyager

Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/Kconfig

@@ -353,7 +353,7 @@ endchoice
 
 config X86_VISWS
 	bool "SGI 320/540 (Visual Workstation)"
-	depends on X86_32 && PCI
+	depends on X86_32 && PCI && !X86_VOYAGER
 	help
 	  The SGI Visual Workstation series is an IA32-based workstation
 	  based on SGI systems chips with some legacy PC hardware attached.