powerpc: Define PVR value for POWER8NVL processor

BugLink: http://bugs.launchpad.net/bugs/1584066Signed-off-by: Philippe Bergheaud <felix@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
(cherry picked from commit 86c9ffcc)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>

arch/powerpc/include/asm/reg.h

@@ -1174,6 +1174,7 @@
 #define PVR_970GX	0x0045
 #define PVR_POWER7p	0x004A
 #define PVR_POWER8E	0x004B
+#define PVR_POWER8NVL	0x004C
 #define PVR_POWER8	0x004D
 #define PVR_BE		0x0070
 #define PVR_PA6T	0x0090