Changed PPC405GPr version from A to B.
diff --git a/cpu/ppc4xx/speed.c b/cpu/ppc4xx/speed.c
index 4541529..f075e3a 100644
--- a/cpu/ppc4xx/speed.c
+++ b/cpu/ppc4xx/speed.c
@@ -87,7 +87,7 @@
 	/*
 	 * Check if PPC405GPr used (mask minor revision field)
 	 */
-	if ((pvr & 0xfffffff0) == (PVR_405GPR_RA & 0xfffffff0)) {
+	if ((pvr & 0xfffffff0) == (PVR_405GPR_RB & 0xfffffff0)) {
 		/*
 		 * Determine FWD_DIV B (only PPC405GPr with new mode strapping).
 		 */