[POWERPC] bestcomm: Restrict bus prefetch bugfix to original mpc5200 silicon.

Only the MPC5200 needs this bug fix.  MPC5200B is okay.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/include/asm-powerpc/mpc52xx.h b/include/asm-powerpc/mpc52xx.h
index 568135f..764d997 100644
--- a/include/asm-powerpc/mpc52xx.h
+++ b/include/asm-powerpc/mpc52xx.h
@@ -20,6 +20,11 @@
 
 #include <linux/suspend.h>
 
+/* Variants of the 5200(B) */
+#define MPC5200_SVR		0x80110010
+#define MPC5200_SVR_MASK	0xfffffff0
+#define MPC5200B_SVR		0x80110020
+#define MPC5200B_SVR_MASK	0xfffffff0
 
 /* ======================================================================== */
 /* Structures mapping of some unit register set                             */