Description

Although the u-boot of rock5b supports ext4, when using ext4 as a whole root partition, sometimes it will take a long time for u-boot to load kernel image, which will cause pd negotiation timeout. So a single /boot partition is still needed. I intended to use ext4 as boot partition filesystem but the ext4 /boot only has usable space 109M while the real partition size is 256M, so I use fat filesystem.

How Has This Been Tested?

• [x] Build image sucessfully.
• [x] Image boots successfully on rock5b

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [ ] 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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