net: rmnet_usb: Add support for PID 0x9079

PID ID 9079 is a clone of 9048 intended for use over HSUSB
connection. The net device name for its interfaces will be
prefixed "rmnet2_usbX". The number and names of its control
interfaces will need to be initialized from userspace.

Change-Id: I98d25f23246c93f96a934dcfc2411c4b6d970b15
Signed-off-by: Jack Pham <jackp@codeaurora.org>