ppc: Remove duplicate definition of PV_POWER7

One definition of PV_POWER7 seems enough to me.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/include/asm/reg.h

@@ -1003,7 +1003,6 @@
 #define PV_970		0x0039
 #define PV_POWER5	0x003A
 #define PV_POWER5p	0x003B
-#define PV_POWER7	0x003F
 #define PV_970FX	0x003C
 #define PV_POWER6	0x003E
 #define PV_POWER7	0x003F