/commits.php is going away

One more small cleanup, forgotten yesterday.
Reported by:	lwhsu

sysutils/u-boot-*: Update to 2021.04

Remove # $FreeBSD$ from Makefiles.

sysutils/atf: Update to v2.4

Bump u-boot ports that depends on it.
While here update the metadata and pkg-descr for the allwinner64 family so
u-boot is put in an alternate location that doesn't conflict with GPT
partitions.

sysutils/u-boot: Update to 2020.04

While here use python3 for it as it now works.
Two slave ports have been marked broken :
u-boot-pandaboard and u-boot-duovero
Both of those boards have ~0 users in FreeBSD so if you are one of
those raise your hand.

Use HTTPS as possible

sysutils/u-boot-rock64: Add two DRAM related patches

Add two new patches related to DRAM controller initialization.
This allow us to use SPL+TPL from mainline u-boot and not relying
on RockChip miniloader anymore.
Thanks to jmcneill@NetBSD.Org for the tip.

u-boot: Update to v2019.10

Update u-boot to its latest version.
For RK3399 we now use SPL+TPL from u-boot, no need for RockChip blob.
Remove one efi related patch that isn't needed anymore.

Tested-on: Pine64-LTS, Rock64, Rockpro64, BBB, RPI2, OrangePi One

sysutils/u-boot-rock64: Add new port for u-boot for the Pine64 Rock64 board

And add support for building RK3328 u-boot in u-boot-master.
This use the rockchip DDR blob + ATF + u-boot-spl and u-boot proper.