Now that qcom has released the gpu firmware for the a750, let's stop
using my fw package in favor of the publicly-available ones.
v2:
* Be more specific in the list of files we want to keep (lumag)
* Uprev the linux firmware version
* Use gfx-ci/firmware rather than the upstream gitlab repo
Signed-off-by: Martin Roukala (né Peres) <martin.roukala@mupuf.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38977>
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