imx: Fix market segment fuse offset on iMX8MP

iMX8MP has shifted market segment fuse one bit from 0x440 [7:6] to [6:5],
correct it in imx common codes.

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>