ppc4xx: Remove temporary TLB entry in POST cache test

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/post/cpu/ppc4xx/cache.c b/post/cpu/ppc4xx/cache.c
index 109ca1f..92b751a 100644
--- a/post/cpu/ppc4xx/cache.c
+++ b/post/cpu/ppc4xx/cache.c
@@ -119,6 +119,8 @@
 	if (ints)
 		enable_interrupts ();
 
+	remove_tlb(virt, CACHE_POST_SIZE);
+
 	return res;
 }