[POWERPC] Remove unused variable in hpte_decode()

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/mm/hash_native_64.c b/arch/powerpc/mm/hash_native_64.c
index 59502c3..4a20d89 100644
--- a/arch/powerpc/mm/hash_native_64.c
+++ b/arch/powerpc/mm/hash_native_64.c
@@ -351,7 +351,7 @@
 	unsigned long hpte_r = hpte->r;
 	unsigned long hpte_v = hpte->v;
 	unsigned long avpn;
-	int i, size, shift, penc, avpnm_bits;
+	int i, size, shift, penc;
 
 	if (!(hpte_v & HPTE_V_LARGE))
 		size = MMU_PAGE_4K;