powerpc: Free up some CPU feature bits by moving out MMU-related features

Some of the 64bit PPC CPU features are MMU-related, so this patch moves
them to MMU_FTR_ bits.  All cpu_has_feature()-style tests are moved to
mmu_has_feature(), and seven feature bits are freed as a result.

Signed-off-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/include/asm/mmu_context.h b/arch/powerpc/include/asm/mmu_context.h
index 81fb412..8e13f65 100644
--- a/arch/powerpc/include/asm/mmu_context.h
+++ b/arch/powerpc/include/asm/mmu_context.h
@@ -67,7 +67,7 @@
 	 * sub architectures.
 	 */
 #ifdef CONFIG_PPC_STD_MMU_64
-	if (cpu_has_feature(CPU_FTR_SLB))
+	if (mmu_has_feature(MMU_FTR_SLB))
 		switch_slb(tsk, next);
 	else
 		switch_stab(tsk, next);