Cleanup (PPC4xx is AMCC now)
diff --git a/cpu/ppc4xx/start.S b/cpu/ppc4xx/start.S
index 003c5b6..f434e20 100644
--- a/cpu/ppc4xx/start.S
+++ b/cpu/ppc4xx/start.S
@@ -42,7 +42,7 @@
 /*	 LICENSED MATERIAL  -  PROGRAM PROPERTY OF I B M */
 /*------------------------------------------------------------------------------- */
 
-/*  U-Boot - Startup Code for IBM 4xx PowerPC based Embedded Boards
+/*  U-Boot - Startup Code for AMCC 4xx PowerPC based Embedded Boards
  *
  *
  *  The processor starts at 0xfffffffc and the code is executed