powerpc/fsl-booke: Get coherent bit from PTE

We shouldn't be always setting 'M' in the TLB entry since its reasonable
for somethings to be mapped non-coherent.  The PTE should have 'M' set
properly.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

arch/powerpc/kernel/head_fsl_booke.S

@@ -746,9 +746,6 @@ finish_tlb_load:
 	rlwimi	r12, r11, 32-19, 27, 31	/* extract WIMGE from pte */
 #else
 	rlwimi	r12, r11, 26, 27, 31	/* extract WIMGE from pte */
-#endif
-#ifdef CONFIG_SMP
-	ori	r12, r12, MAS2_M
 #endif
 	mtspr	SPRN_MAS2, r12