uboot-imx

board/freescale/common: Check IR chip mode for VID support

IR chip on all the boards are required to be used in Intel mode
to support VID. VDD will not be adjusted if IR chip is used in
other modes.

Signed-off-by: Ying Zhang <b40530@freescale.com>
Reviewed-by: York Sun <york.sun@nxp.com>