net: usb: Update new IOCTLs to meet new spec

Update the USB RmNet driver to support the extended IOCTL specification
for RmNet Data. New extended structure is used for supporting IOCTLs
above and beyond the 16 IOCTL limitation.

CRs-Fixed: 554883
Change-Id: I99a2778f5dee1c88a830f887c89c9ee8f5512000
Signed-off-by: Harout Hedeshian <harouth@codeaurora.org>