db845c: Add usbmisc support

Add usbmisc support to db845c.

This is needed for creating proper cdc-wdm files in /dev for
hardware like USB QMI discrete modems which use the standard
kernel driver (qmi_wwan).

A similar change is already available for the Hikey.

Test: tested with a qmi based modem (Telit FN980)
Change-Id: Ifcf88e101e5d115c7e810d2467471212a58f6cf3
1 file changed