Description

1. Removed lcd node when screen is not attached. Turns out the Khadas u-boot has some code hidden deep within pxe.c file to enable and disable lcd screen. As we don't use extlinux for vim1s and vim4, that doesn't get executed for us leaving the device to detect ghost screens. Hence copied the code to bootscript in order to disable the lcd screens when they are not really present. This makes the vim4 and vim1s a lot more responsive. Also fixes issue where we can't login to gnome because login screen was being rendered on non-existent lcd screen.
2. Fixed issue that prevented armbian-bsp-cli package for meson-s4t7 family to uninstall because of the added /etc/initramfs-tools/modules file. As this required custom code to be added in the postrm script of the package, I have added support for the same in armbian-bsp-cli package similar to how things worked for postinst script.
3. Disabled chrony-wait service as it on meson-s4t7 devices as it was causing firstlogin to get stuck for 4 minutes. I had to mask it as its not really enabled when hook executes and gets enabled sometime later (not really sure when, was not able to track that down).

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also note any relevant details for your test configuration.

• [X] Tested with Debian gnome bookworm image on VIM4

Checklist:

• [ ] 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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