sh: replace remaining __FUNCTION__ occurrences

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/lib64/c-checksum.c b/arch/sh/lib64/c-checksum.c
index 5dfbd8b..5c284e0 100644
--- a/arch/sh/lib64/c-checksum.c
+++ b/arch/sh/lib64/c-checksum.c
@@ -207,7 +207,7 @@
 	result = (result & 0xffffffff) + (result >> 32);
 
 	pr_debug("%s saddr %x daddr %x len %x proto %x sum %x result %08Lx\n",
-		__FUNCTION__, saddr, daddr, len, proto, sum, result);
+		__func__, saddr, daddr, len, proto, sum, result);
 
 	return (__wsum)result;
 }