ppc4xx: Remove IOP480 support

Since the IOP480 (PPC401/3 variant from PLX) is only used on 2
boards that are not actively maintained, lets remove support
for it completely. This way the ppc4xx code will get a bit cleaner.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Matthias Fuchs <matthias.fuchs@esd.eu>
Acked-by: Marek Vasut <marex@denx.de>
diff --git a/arch/powerpc/include/asm/cache.h b/arch/powerpc/include/asm/cache.h
index e6b8f69..5f9c640 100644
--- a/arch/powerpc/include/asm/cache.h
+++ b/arch/powerpc/include/asm/cache.h
@@ -8,7 +8,7 @@
 #include <asm/processor.h>
 
 /* bytes per L1 cache line */
-#if defined(CONFIG_8xx) || defined(CONFIG_IOP480)
+#if defined(CONFIG_8xx)
 #define	L1_CACHE_SHIFT	4
 #elif defined(CONFIG_PPC64BRIDGE)
 #define L1_CACHE_SHIFT	7