[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>

arch/powerpc/mm/hash_native_64.c

@@ -351,7 +351,7 @@ static void hpte_decode(hpte_t *hpte, unsigned long slot,
 	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;