aufs: tiny, remove unsued funcs

Signed-off-by: J. R. Okajima <hooanon05@yahoo.co.jp>
aufs: consolidate copy-up args 1/4, au_cpup_simple()

Simply consolidate the parameters of the function.

Signed-off-by: J. R. Okajima <hooanon05@yahoo.co.jp>
aufs: consolidate copy-up args 2/4, au_cpup_wh() and au_do_cpup_wh()

Simply consolidate the parameters of the function.

Signed-off-by: J. R. Okajima <hooanon05@yahoo.co.jp>
aufs: consolidate copy-up args 3/4, au_sio_cpup_wh()

Simply consolidate the parameters of the function.

Signed-off-by: J. R. Okajima <hooanon05@yahoo.co.jp>
aufs: consolidate copy-up args 4/4, au_sio_cpup_simple()

Simply consolidate the parameters of the function.

Signed-off-by: J. R. Okajima <hooanon05@yahoo.co.jp>
aufs: replace au_sio_cpup_simple_h_open() by AuCpup_HOPEN flag

The behaviour itself doesn't change.

Signed-off-by: J. R. Okajima <hooanon05@yahoo.co.jp>
Merge remote-tracking branch 'aufs3-standalone/aufs3.2/00base' into aufs3.2/10static
Merge branch 'aufs3.2/10static' into aufs3.2/11proc_map
Merge branch 'aufs3.2/11proc_map' into aufs3.2/18public