release: remove the RPI CM4s .dtb

This isn't actually packaged by the sysutils/rpi-firmware port, so we
cannot include it in the image. Fix the RPI release build until an
interested party adds it to the port and packages are available.

Reported by: cperciva

add dtb support for RPI CM4, CM4s, CM4_ioBoard

Signed-off-by: Klaus Küchemann <maciphone2@googlemail.com>
Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/1182

arm64/RPI: enable powerd by default on arm64-aarch64-RPI images

Most 64-bit Raspberry Pi models have a variable processor clock
speed that defaults to a slow speed (e.g. 600 MHz for a nominal
1.5 GHz clock). This results in everything running slowly unless
or until powerd is started, and FreeBSD is then thought to be slow.
Enable powerd by default in /etc/rc.conf on the arm64-aarch64-RPI
images. Tested on Raspberry Pi 3B+ and 4B so far.

PR: 256836
MFC after: 1 month
Reviewed by: rgrimes
Differential Revision: https://reviews.freebsd.org/D43296

Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

release: increase IMAGE_SIZE for arm, arm64, riscv

Related to: PR 264032
MFC after: 5 minutes
Sponsored by: Rubicon Communications, LLC ("Netgate")

Add bcm2710-rpi-cm3.dtb to the list of DTBs being added.

This allows to boot out of the box on the RPI COmpute Module 3 with 32G
of eMMC.

Tested by: imp confirmed .dtb is in the rpi-firmware pkg
Reviewed by: gjb@, imp@
Pull Request: https://github.com/freebsd/freebsd-src/pull/452

Sponsored by: Netflix

release: permanently remove the 'reldoc' target and associates

Following 7b1d1a1658ffb69eff93afc713f9e88ed8b20eac, the structure
for the reldoc target has significantly changed as result of the
ASCIIDoctor/Hugo migration. As the release notes related files
on the installation medium are inherently out of date, purge them
entirely.

Discussed within: re, doceng
No objection: re (silence), doceng (silence)
Timeout: 2 weeks
MFC after: 1 week
MFC to: stable/13, stable/12, and stable/11 only
Sponsored by: Rubicon Communications, LLC ("Netgate")

release: Rename arm64/RPI3.conf to arm64/RPI.conf

We now have a u-boot port and config.txt for booting on all 64bits
variant of the RPI boards (RPI2v1.1, RPI3* and RPI4*) so use
the new u-boot-rpi-arm64 and the config_arm64.txt files.

Discussed with: karels, kevans