net: stmmac: add support for v2x over ethernet config

Add new variables cv2x_mode for new config.
Store MAC address and Vlan id from /dev/emac to driver data.
Select right TX queue for cv2x AP and MDM mode.
Config HW register for cv2x vlan filtering.
Confgi HW register to disable checksum for CV2X queue.

Change-Id: I74b78f12e1277cddaa0fdae017f79c6b3020a36e
Acked-by: Ning Cai <ncai@qti.qualcomm.com>
Signed-off-by: Sunil Paidimarri <hisunil@codeaurora.org>