This patch separate xfs_attr_node_addname into two functions.  This will
help to make it easier to hoist parts of xfs_attr_node_addname that need
state management
Signed-off-by: NAllison Henderson <allison.henderson@oracle.com>
Reviewed-by: NBrian Foster <bfoster@redhat.com>
Reviewed-by: NChandan Babu R <chandanrlinux@gmail.com>
Reviewed-by: NDarrick J. Wong <djwong@kernel.org>