[POWERPC] Replace remaining __FUNCTION__ occurrences

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index abeb0eb..5f55399 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -122,7 +122,7 @@
 		/* GFP_ATOMIC to avoid might_sleep warnings during boot */
 		kcore_mem = kmalloc(sizeof(struct kcore_list), GFP_ATOMIC);
 		if (!kcore_mem)
-			panic("%s: kmalloc failed\n", __FUNCTION__);
+			panic("%s: kmalloc failed\n", __func__);
 
 		kclist_add(kcore_mem, __va(base), size);
 	}