[POWERPC] 85xx: Don't write reserved values to MAS1[TSIZE]

Some of the current tlbwe instructions early on in head_fsl_booke.S take
advantage of unarchitected behavior that allows the writing of reserved
values to the TSIZE field.  This patch corrects that, as well as an error
where an uninitialized (by linux) value was written into a MAS register and
used for a tlbwe.

Correct this for both arch/ppc and arch/powerpc.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/kernel/head_fsl_booke.S

@@ -206,7 +206,8 @@ skpinv:	addi	r6,r6,1				/* Increment */
 	rlwimi	r7,r3,16,4,15	/* Setup MAS0 = TLBSEL | ESEL(r3) */
 	mtspr	SPRN_MAS0,r7
 	tlbre
-	li	r6,0
+	mfspr	r6,SPRN_MAS1
+	rlwinm	r6,r6,0,2,0	/* clear IPROT */
 	mtspr	SPRN_MAS1,r6
 	tlbwe
 	/* Invalidate TLB1 */
@@ -248,6 +249,8 @@ skpinv:	addi	r6,r6,1				/* Increment */
 	rlwimi	r7,r5,16,4,15	/* Setup MAS0 = TLBSEL | ESEL(r5) */
 	mtspr	SPRN_MAS0,r7
 	tlbre
+	mfspr	r8,SPRN_MAS1
+	rlwinm	r8,r8,0,2,0	/* clear IPROT */
 	mtspr	SPRN_MAS1,r8
 	tlbwe
 	/* Invalidate TLB1 */

arch/ppc/kernel/head_fsl_booke.S

@@ -206,7 +206,8 @@ skpinv:	addi	r6,r6,1				/* Increment */
 	rlwimi	r7,r3,16,4,15	/* Setup MAS0 = TLBSEL | ESEL(r3) */
 	mtspr	SPRN_MAS0,r7
 	tlbre
-	li	r6,0
+	mfspr	r6,SPRN_MAS1
+	rlwinm	r6,r6,0,2,0	/* clear IPROT */
 	mtspr	SPRN_MAS1,r6
 	tlbwe
 	/* Invalidate TLB1 */
@@ -248,6 +249,8 @@ skpinv:	addi	r6,r6,1				/* Increment */
 	rlwimi	r7,r5,16,4,15	/* Setup MAS0 = TLBSEL | ESEL(r5) */
 	mtspr	SPRN_MAS0,r7
 	tlbre
+	mfspr	r8,SPRN_MAS1
+	rlwinm	r8,r8,0,2,0	/* clear IPROT */
 	mtspr	SPRN_MAS1,r8
 	tlbwe
 	/* Invalidate TLB1 */