HACK: BOOT ORDER: NVMe SDCARD eMMC.

NOTES: In my testing there has been no false starts or hangs up. Meaning the boot process has been stable.

The downside to this in my opinion is that if there is an OS on the NVMe it will always take boot priority. The drive would need to be pulled or DD'd in order for SD eMMC boot to kick in.

This has been tested by pulling the NVMe and booting from the drive and killing it; dd if=/dev/zero of=/dev/nvme0n1 bs=32768 count=32768

Tested-on: Waveshare CM4-IO-BASE-B

Checklist:

• [ ] My code follows the style guidelines of this project
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• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [X] My changes generate no new warnings
• [ ] Any dependent changes have been merged and published in downstream modules

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