MLK-23753 imx8: Implement bus active check on OTG port

MLK-23753 imx8: Implement bus active check on OTG port

Using this way to check if OTG bus active, not depending on checking
OTG register. Because checking OTG register only working for first
cold boot from ROM. While doing partition reboot, SCFW will turn off
the entire conn SS, so that way won't work.

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
(cherry picked from commit ae746dcdb19914b5aa10ca8e8e9e9d5de854cdeb)
(cherry picked from commit a31720a8614e929ff4aff6ed12a4b065502437c8)