configs/raspberrypi3_64: remove upstream device-tree blob
There are two kind of device-tree blobs up to the Rasperry Pi 3[1][2]:
- the downstream dtbs are named after the die name (i.e. BCM27xx)
- the upstream dtbs are name after the package name (i.e. BCM283x)
Every defconfigs install exclusively the downstream device-tree blob, at
the exception of the raspberrypi3_64_defconfig that installs both since
the begining.
This removes the upstream device-tree blob for the beauty of
consistency.
Note: It is possible to load the upstream device-tree using the
upstream_kernel property[3].
Raspberry Pi, Compute Module, Raspberry Pi Zero and Raspberry Pi Zero W
use bcm2835 for upstream and bcm2708 for downstream.
Raspberry Pi 2 uses bcm2836 for upstream and bcm2709 for downstream.
Raspberry Pi 2 rev 1.2, Raspberry Pi 3, Compute Module 3/3+ and
Raspberry Zero 2 W use bcm2837 for upstream and bcm2709 for downstream.
Raspberry Pi 4/400 and Compute Module 4/4s uses bcm2711 and Raspberry Pi
5 uses bcm2712.
[1]: https://github.com/raspberrypi/linux/issues/3237
[2]: https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#flagship-series
[3]: https://www.raspberrypi.com/documentation/computers/legacy_config_txt.html#upstream_kernel
Signed-off-by: Gaël PORTAY <gael.portay@rtone.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>