[POWERPC] Remove CPU_FTR_NEED_COHERENT for 7448.

Remove CPU_FTR_NEED_COHERENT for MPC7448 (and single-core MPC86xx).
This prevents needlessly setting M=1 when not SMP.
Signed-off-by: NJames.Yang <James.Yang@freescale.com>
Acked-by: NJon Loeliger <jdl@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

arch/powerpc/kernel/cputable.c

@@ -836,7 +836,7 @@ static struct cpu_spec cpu_specs[] = {
 		.pvr_mask		= 0xffff0000,
 		.pvr_value		= 0x80040000,
 		.cpu_name		= "7448",
-		.cpu_features		= CPU_FTRS_7447A,
+		.cpu_features		= CPU_FTRS_7448,
 		.cpu_user_features	= COMMON_USER |
 			PPC_FEATURE_HAS_ALTIVEC_COMP | PPC_FEATURE_PPC_LE,
 		.icache_bsize		= 32,

include/asm-powerpc/cputable.h

@@ -302,6 +302,12 @@ extern void do_feature_fixups(unsigned long value, void *fixup_start,
 	    CPU_FTR_HPTE_TABLE | CPU_FTR_SPEC7450 | \
 	    CPU_FTR_NAP_DISABLE_L2_PR | CPU_FTR_HAS_HIGH_BATS | \
 	    CPU_FTR_NEED_COHERENT | CPU_FTR_PPC_LE)
+#define CPU_FTRS_7448	(CPU_FTR_COMMON | CPU_FTR_SPLIT_ID_CACHE | \
+	    CPU_FTR_USE_TB | \
+	    CPU_FTR_MAYBE_CAN_NAP | CPU_FTR_L2CR | CPU_FTR_ALTIVEC_COMP | \
+	    CPU_FTR_HPTE_TABLE | CPU_FTR_SPEC7450 | \
+	    CPU_FTR_NAP_DISABLE_L2_PR | CPU_FTR_HAS_HIGH_BATS | \
+	    CPU_FTR_PPC_LE)
 #define CPU_FTRS_82XX	(CPU_FTR_COMMON | CPU_FTR_SPLIT_ID_CACHE | \
 	    CPU_FTR_MAYBE_CAN_DOZE | CPU_FTR_USE_TB)
 #define CPU_FTRS_G2_LE	(CPU_FTR_SPLIT_ID_CACHE | CPU_FTR_MAYBE_CAN_DOZE | \