Wasted days on this issue too.

See why the problem exists here:
https://github.com/nxp-imx/meta-imx/blob/styhead-6.12.3-1.0.0/meta-imx-bsp/recipes-kernel/linux/linux-imx_6.12.bb#L56-L58

Resolution here:
https://community.nxp.com/t5/i-MX-Processors/porting-guide-errors/m-p/1578030/highlight/true#M199614