uboot-phytec

MLK-23574-26 ehci-mx6: fix controller index for imx8m and imx8

The bind codes calculate the address offset for controller index, but
it is wrong for imx8m and imx8. It causes secondary controller fails to
work. So fix this problem, and also change all seq to req_seq.

There is another issue here for imx8, the codes use runtime CPU type check.
One iMX8, this check depends on IPC communication with SCFW, and need
MU driver been probed. But the usbotg is configured with "u-boot,dm_spl"
property for SDP download in SPL, so it will bind in early DM in u-boot
while the MU is not bound at same time, so the CPU type check will hang.
Fix it to use static check.

Signed-off-by: Ye Li <ye.li@nxp.com>