support/testing: sync TestATFAllwinner with orangepi_zero_plus2_defconfig

support/testing: sync TestATFAllwinner with orangepi_zero_plus2_defconfig

u-boot-2021.04 seems to be broken when pylibfdt support is enabled
and the latest python3/setuptools are used.

Since the TestATFAllwinner is using bananapi_m64 as u-boot defconfig
but the Buildroot defconfig of this board was removed in 2022.11 [1]
update TestATFAllwinner to use a newer BSP. Use the one provided
by orangepi_zero_plus2_defconfig.

[1] daf3c6661f823e566b6310042884c36c1d73f1de

Fixes:
https://gitlab.com/buildroot.org/buildroot/-/jobs/6477656317 (TestATFAllwinner)

Signed-off-by: Romain Naour <[email protected]>
Signed-off-by: Yann E. MORIN <[email protected]>