uboot-phytec

MLK-14994 mx7ulp: Update M4 image header version check

The latest M4 image uses the version 0x41 not 0x40, have to update
it when checking M4 image. Otherwise M4 image won't be loaded.

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
(cherry picked from commit 4f421455c850226b9acec9a43b3997995929872e)