Merge branch 'cdc-next'

Ben Chan says:

====================
Adjust MTU as indicated by MBIM extended functional descriptor.

The MBIM extended functional descriptor, defined in "Universal Serial Bus
Communications Class Subclass Specification for Mobile Broadband Interface
Model, Revision 1.0, Errata-1" by USB-IF, indicates the operator preferred MTU
value via a wMTU field.

This patch set ensures that the initial MTU value set by cdc_ncm on a MBIM net
device does not exceed the wMTU value, provided the MBIM device exposes a MBIM
extended functional descriptor.

* Changelog
v2: Fixed a le16_to_cpu conversion issue in patch 2/2 pointed out by
    Bjørn Mork <bjorn@mork.no>
v3: No code changes. Resubmitted to include patch 1/2 as suggested by
    David Miller <davem@davemloft.net>
v4: No code changes. Resubmitted as suggested by David Miller:
    - Added a summary of the patch set
    - Carried the ACK from Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    - Added a specified the tree (net-next) to apply the patch set to
====================

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