[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/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index 8f1f4e5..0c66366 100644
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch/powerpc/kernel/iommu.c
@@ -520,7 +520,7 @@
 	unsigned int order;
 
 	if (!tbl || !tbl->it_map) {
-		printk(KERN_ERR "%s: expected TCE map for %s\n", __FUNCTION__,
+		printk(KERN_ERR "%s: expected TCE map for %s\n", __func__,
 				node_name);
 		return;
 	}
@@ -530,7 +530,7 @@
 	for (i = 0; i < (tbl->it_size/64); i++) {
 		if (tbl->it_map[i] != 0) {
 			printk(KERN_WARNING "%s: Unexpected TCEs for %s\n",
-				__FUNCTION__, node_name);
+				__func__, node_name);
 			break;
 		}
 	}