powerpc/4xx: Extended DCR support v2

This adds supports to the "extended" DCR addressing via the indirect
mfdcrx/mtdcrx instructions supported by some 4xx cores (440H6 and
later).

I enabled the feature for now only on AMCC 460 chips.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 7e87195..921a229 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -1509,7 +1509,7 @@
 		.pvr_mask		= 0xffff0002,
 		.pvr_value		= 0x13020002,
 		.cpu_name		= "460EX",
-		.cpu_features		= CPU_FTRS_44X,
+		.cpu_features		= CPU_FTRS_440x6,
 		.cpu_user_features	= COMMON_USER_BOOKE | PPC_FEATURE_HAS_FPU,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
@@ -1521,7 +1521,7 @@
 		.pvr_mask		= 0xffff0002,
 		.pvr_value		= 0x13020000,
 		.cpu_name		= "460GT",
-		.cpu_features		= CPU_FTRS_44X,
+		.cpu_features		= CPU_FTRS_440x6,
 		.cpu_user_features	= COMMON_USER_BOOKE | PPC_FEATURE_HAS_FPU,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,