sysfs, kernfs: remove sysfs_add_one()

sysfs_add_one() is a wrapper around __sysfs_add_one() which prints out
duplicate name warning if __sysfs_add_one() fails with -EEXIST.  The
previous kernfs conversions moved all dup warnings to sysfs interface
functions and sysfs_add_one() doesn't have any user left.

Remove sysfs_add_one() and update __sysfs_add_one() to take its name.

This patch doesn't make any functional changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c
index 352fbbb..76efeab 100644
--- a/fs/sysfs/symlink.c
+++ b/fs/sysfs/symlink.c
@@ -47,7 +47,7 @@
 	sysfs_get(target);	/* ref owned by symlink */
 
 	sysfs_addrm_start(&acxt);
-	error = __sysfs_add_one(&acxt, sd, parent);
+	error = sysfs_add_one(&acxt, sd, parent);
 	sysfs_addrm_finish(&acxt);
 
 	if (!error)