Build u-boot for RK3399

u-boot rk3xxx-2024.04 for RK3399 #8

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Run time

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Job	Run time
rk3399-generic	1m 7s
rk3399-khadas-edge	1m 16s
rk3399-khadas-edge-captain	1m 16s
rk3399-khadas-edge-v	1m 15s
rk3399-nanopc-t4	1m 17s
rk3399-nanopi-r4s	2m 2s
rk3399-pinebook-pro	1m 17s
rk3399-pinephone-pro	1m 19s
rk3399-rock-4c-plus	1m 12s
rk3399-rock-4se	1m 23s
rk3399-rock960	1m 19s
rk3399-rock-pi-4	1m 20s
rk3399-rock-pi-4c	1m 23s
rk3399-rockpro64	1m 20s
	18m 46s