x86, VisWS: build fix

fix:

arch/x86/kernel/visws_quirks.c: In function ‘visws_early_detect’:
arch/x86/kernel/visws_quirks.c:293: error: ‘no_broadcast’ undeclared (first use in this function)
arch/x86/kernel/visws_quirks.c:293: error: (Each undeclared identifier is reported only once
arch/x86/kernel/visws_quirks.c:293: error: for each function it appears in.)
make[1]: *** [arch/x86/kernel/visws_quirks.o] Error 1
make: *** [arch/x86/kernel/visws_quirks.o] Error 2

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

arch/x86/kernel/visws_quirks.c

@@ -57,6 +57,8 @@
 #include <linux/pci.h>
 #include <linux/pci_ids.h>
 
+extern int no_broadcast;
+
 #include <asm/io.h>
 #include <asm/apic.h>
 #include <asm/arch_hooks.h>