powerpc: Define Power7+ PV constant PV_POWER7p

This definition will be used by subsequent perf and oprofile patches
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/include/asm/reg.h

@@ -1020,6 +1020,7 @@
 #define PVR_630p	0x0041
 #define PVR_970MP	0x0044
 #define PVR_970GX	0x0045
+#define PVR_POWER7p	0x004A
 #define PVR_BE		0x0070
 #define PVR_PA6T	0x0090