usb: gadget: f_gsi: Use HW accelerated EPs for RmNet V2X instance

When both RmNet LTE and V2X instances are enabled in a
composition, use hardware accelerated EPs for V2X instance and
normal EPs for LTE, and also set channel parameter flag
'is_sw_path' to true for LTE, so that IPA can ignore the dummy
address for GEVENTCOUNT register.

Change-Id: I6e194dbea4d8321c33501e8cab4f1f2f0817291f
Signed-off-by: Ajay Agarwal <ajaya@codeaurora.org>