colibri_vf: Add board_usb_phy_mode function

Add board_usb_phy_mode function for detecting whether a port is
being used as host or client using a GPIO. On Colibri Vybrid we
provide GPIO 102 for this very same purpose.

Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>
1 file changed