powerpc/83xx: Add support for get_svr() for 83xx devices

Defines get_svr() for 83xx devices

Signed-off-by: Ramneek Mehresh <ramneek.mehresh@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/arch/powerpc/cpu/mpc83xx/start.S b/arch/powerpc/cpu/mpc83xx/start.S
index b4fafe6..7f74a50 100644
--- a/arch/powerpc/cpu/mpc83xx/start.S
+++ b/arch/powerpc/cpu/mpc83xx/start.S
@@ -120,6 +120,11 @@
 	mtspr	SRR1, r3
 	rfi
 
+	.globl get_svr
+get_svr:
+	mfspr	r3, SVR
+	blr
+
 	.globl get_pvr
 get_pvr:
 	mfspr	r3, PVR