xfs: cleanup __FUNCTION__ usage

__FUNCTION__ exists only for backwards compatibility reasons
with old gcc versions. Replace it with __func__.

Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
diff --git a/fs/xfs/xfs_icreate_item.c b/fs/xfs/xfs_icreate_item.c
index 9b3994b..017904a 100644
--- a/fs/xfs/xfs_icreate_item.c
+++ b/fs/xfs/xfs_icreate_item.c
@@ -201,7 +201,7 @@
 	if (length != igeo->ialloc_blks &&
 	    length != igeo->ialloc_min_blks) {
 		xfs_warn(log->l_mp,
-			 "%s: unsupported chunk length", __FUNCTION__);
+			 "%s: unsupported chunk length", __func__);
 		return -EINVAL;
 	}
 
@@ -209,7 +209,7 @@
 	if ((count >> mp->m_sb.sb_inopblog) != length) {
 		xfs_warn(log->l_mp,
 			 "%s: inconsistent inode count and chunk length",
-			 __FUNCTION__);
+			 __func__);
 		return -EINVAL;
 	}