arch/arm64/imx9: Fix usdhc dma receive

[joukkone]

Invalidate cache when dma transfer is ready

Note: Please adhere to Contributing Guidelines.

Summary

Read operation gives sometimes invalid data, this fixes that issue

Impact

Update this section, where applicable, on how change affects users,
build process, hardware, documentation, security, compatibility, etc.

Testing

Update this section with details on how did you verify the change,
what Host was used for build (OS, CPU, compiler, ..), what Target was
used for verification (arch, board:config, ..), etc. Providing build
and runtime logs from before and after change is highly appreciated.