HummingBoard - Fix for faking USB OTG host on solo / dual lite

The pin muxing for HummingBoard was buggy and this fix adds correct USB OTG ID
faking mehanism via unconnected RX_ER pin.

The result is that the USB OTG phy will detect the USB interface as host
interface as required (vs. device).

Signed-off-by: Rabeeh Khoury <rabeeh@solid-run.com>