Raspberry Pi 4 doesn't have a working USB driver in u-boot. This makes
the defconfig not to enable the relevant config case which breaks the
build with:
error: expected '}' before
'BOOT_TARGET_DEVICES_references_USB_without_CONFIG_CMD_USB'
This was fixed in upstream and we backport the relevant commit.
Signed-off-by: Andrei Gherzan <andrei@balena.io>
The upstream branch might suffer rebases due to effort of pushing the
patches upstream. To avoid issues, let's have here the patches we need
for RPi 4 support.
These patches are backported on the u-boot version in warrior.
Signed-off-by: Andrei Gherzan <andrei@gherzan.ro>