usb: f_mbim: Fix NTB format selection

NTB-16 (16 bit) format is only supported by this driver. When the
function reports that it supports only 16 bit format, host must
not send GET/SET NTB format control requests. The current code
accepts NTB-32 format request, which is not correct.

The datagrams aggregation/de-aggreagtion is not done in this driver,
remove mbim_ndp_parser_opts references.

Change-Id: I2e5203ca3566454932c4e9909fe9e7655a99f1c2
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>