udf: Move udf_expand_dir_adinicb() to its callsite

[ Upstream commit a27b2923 ]

There is just one caller of udf_expand_dir_adinicb(). Move the function
to its caller into namei.c as it is more about directory handling than
anything else anyway.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>