powerpc/mm: Add SAO Feature bit to the cputable

Add the CPU feature bit for the new Strong Access Ordering
facility of Power7
Signed-off-by: NDave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: NJoel Schopp <jschopp@austin.ibm.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

include/asm-powerpc/cputable.h

@@ -186,6 +186,7 @@ extern void do_feature_fixups(unsigned long value, void *fixup_start,
 #define CPU_FTR_1T_SEGMENT		LONG_ASM_CONST(0x0004000000000000)
 #define CPU_FTR_NO_SLBIE_B		LONG_ASM_CONST(0x0008000000000000)
 #define CPU_FTR_VSX			LONG_ASM_CONST(0x0010000000000000)
+#define CPU_FTR_SAO			LONG_ASM_CONST(0x0020000000000000)
 
 #ifndef __ASSEMBLY__
 
@@ -401,7 +402,7 @@ extern void do_feature_fixups(unsigned long value, void *fixup_start,
 	    CPU_FTR_MMCRA | CPU_FTR_SMT | \
 	    CPU_FTR_COHERENT_ICACHE | CPU_FTR_LOCKLESS_TLBIE | \
 	    CPU_FTR_PURR | CPU_FTR_SPURR | CPU_FTR_REAL_LE | \
-	    CPU_FTR_DSCR)
+	    CPU_FTR_DSCR | CPU_FTR_SAO)
 #define CPU_FTRS_CELL	(CPU_FTR_USE_TB | CPU_FTR_LWSYNC | \
 	    CPU_FTR_HPTE_TABLE | CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_CTRL | \
 	    CPU_FTR_ALTIVEC_COMP | CPU_FTR_MMCRA | CPU_FTR_SMT | \