linux-wandboard

MLK-12676-2 arm: dts: enable usb otg2 for imx6ull arm2 board

Use a dedicatd dts file to enable both OTG1 and OTG2 ports in OTG mode,
- otg2 ID pin is muxed with SD1 vselect, so move it out of hog and don't
  use it in usdhc1 in usb dts.
- otg2 vbus control use GPIO1_IO09 since the original gpio is shared
  with i2c1(with pmic chip connected).

Signed-off-by: Li Jun <jun.li@nxp.com>