ppc4xx: Remove temporary TLB entry in POST cache test only for 440

Signed-off-by: Stefan Roese <sr@denx.de>

post/cpu/ppc4xx/cache.c

diff --git a/post/cpu/ppc4xx/cache.c b/post/cpu/ppc4xx/cache.c
index 38e6e98..30d5088 100644
--- a/post/cpu/ppc4xx/cache.c
+++ b/post/cpu/ppc4xx/cache.c
@@ -119,7 +119,9 @@
 	if (ints)
 		enable_interrupts ();
 
+#ifdef CONFIG_440
 	remove_tlb((u32)virt, CACHE_POST_SIZE);
+#endif
 
 	return res;
 }