Merge branch 'wwan-debugfs'

M Chetan Kumar says:

====================
net: wwan: debugfs dev reference not dropped

This patch series contains WWAN subsystem & IOSM Driver changes to
drop dev reference obtained as part of wwan debugfs dir entry retrieval.

PATCH1: A new debugfs interface is introduced in wwan subsystem so
that wwan driver can drop the obtained dev reference post debugfs use.

PATCH2: IOSM Driver uses new debugfs interface to drop dev reference.

Please refer to commit messages for details.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>