MLK-11230 imx6: USB: Modify OTG ID pin pad setting to pull up

MLK-11230 imx6: USB: Modify OTG ID pin pad setting to pull up

Set the ID pin pad to pull up not the pull down at default, otherwise
we can't enter the device mode, but always detect as host.

After this change we have to use portA cable to play as host,
and use portB cable for device.

Signed-off-by: Ye.Li <B37916@freescale.com>
(cherry picked from commit b315d6b36a913d75d25284320e69050ebdf7a7eb)