powerpc/fsl-booke: Use SPRN_SPRGn rather than mfsprg/mtsprg

This fixes a build break that was probably introduced with the removal
of -Wa,-me500 (commit f49596a4), where
the assembler refuses to recognize SPRG4-7 with a generic PPC target.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Cc: Dongsheng Wang <dongsheng.wang@freescale.com>
Cc: Anton Vorontsov <avorontsov@mvista.com>
Reviewed-by: Wang Dongsheng <dongsheng.wang@freescale.com>
Tested-by: Wang Dongsheng <dongsheng.wang@freescale.com>

arch/powerpc/kernel/swsusp_booke.S

@@ -74,21 +74,21 @@ _GLOBAL(swsusp_arch_suspend)
 	bne	1b
 
 	/* Save SPRGs */
-	mfsprg	r4,0
+	mfspr	r4,SPRN_SPRG0
 	stw	r4,SL_SPRG0(r11)
-	mfsprg	r4,1
+	mfspr	r4,SPRN_SPRG1
 	stw	r4,SL_SPRG1(r11)
-	mfsprg	r4,2
+	mfspr	r4,SPRN_SPRG2
 	stw	r4,SL_SPRG2(r11)
-	mfsprg	r4,3
+	mfspr	r4,SPRN_SPRG3
 	stw	r4,SL_SPRG3(r11)
-	mfsprg	r4,4
+	mfspr	r4,SPRN_SPRG4
 	stw	r4,SL_SPRG4(r11)
-	mfsprg	r4,5
+	mfspr	r4,SPRN_SPRG5
 	stw	r4,SL_SPRG5(r11)
-	mfsprg	r4,6
+	mfspr	r4,SPRN_SPRG6
 	stw	r4,SL_SPRG6(r11)
-	mfsprg	r4,7
+	mfspr	r4,SPRN_SPRG7
 	stw	r4,SL_SPRG7(r11)
 
 	/* Call the low level suspend stuff (we should probably have made
@@ -150,21 +150,21 @@ _GLOBAL(swsusp_arch_resume)
 	bl	_tlbil_all
 
 	lwz	r4,SL_SPRG0(r11)
-	mtsprg	0,r4
+	mtspr	SPRN_SPRG0,r4
 	lwz	r4,SL_SPRG1(r11)
-	mtsprg	1,r4
+	mtspr	SPRN_SPRG1,r4
 	lwz	r4,SL_SPRG2(r11)
-	mtsprg	2,r4
+	mtspr	SPRN_SPRG2,r4
 	lwz	r4,SL_SPRG3(r11)
-	mtsprg	3,r4
+	mtspr	SPRN_SPRG3,r4
 	lwz	r4,SL_SPRG4(r11)
-	mtsprg	4,r4
+	mtspr	SPRN_SPRG4,r4
 	lwz	r4,SL_SPRG5(r11)
-	mtsprg	5,r4
+	mtspr	SPRN_SPRG5,r4
 	lwz	r4,SL_SPRG6(r11)
-	mtsprg	6,r4
+	mtspr	SPRN_SPRG6,r4
 	lwz	r4,SL_SPRG7(r11)
-	mtsprg	7,r4
+	mtspr	SPRN_SPRG7,r4
 
 	/* restore the MSR */
 	lwz	r3,SL_MSR(r11)