powerpc: Fix some compile problems with the VDSO stuff

We needed the VDSO symbols in the arch/ppc asm-offsets.c, and there
were a few usages of _systemcfg still left lying around.

Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/platforms/pseries/smp.c b/arch/powerpc/platforms/pseries/smp.c
index 3ba794c..5800cde 100644
--- a/arch/powerpc/platforms/pseries/smp.c
+++ b/arch/powerpc/platforms/pseries/smp.c
@@ -46,7 +46,7 @@
 #include <asm/rtas.h>
 #include <asm/pSeries_reconfig.h>
 #include <asm/mpic.h>
-#include <asm/systemcfg.h>
+#include <asm/vdso_datapage.h>
 
 #include "plpar_wrappers.h"
 
@@ -97,7 +97,7 @@
 	int cpu = smp_processor_id();
 
 	cpu_clear(cpu, cpu_online_map);
-	_systemcfg->processorCount--;
+	vdso_data->processorCount--;
 
 	/*fix boot_cpuid here*/
 	if (cpu == boot_cpuid)