staging: vt6656: vnt_usb_send_context remove variable data.

A limit is also placed in vnt_tx_context of MAX_TOTAL_SIZE_WITH_ALL_HEADERS
limiting size.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Link: https://lore.kernel.org/r/9416e1a8-bd72-ffb1-5366-78361d053907@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>