sysutils/u-boot-bhyve-arm64 2024.07

sysutils/u-boot: Update to 2024.10

Except for u-boot-bhyve-arm64 which doesn't compile, so stay on 2024.07 for it.

sysutils/u-boot-*: Clean up unnecessary U_BOOT_SLAVE_PORTREVISION_*

sysutils/u-boot-bhyve-arm64: Fix after the 2024.01 import

Because this config is not yet upstreamed (pending arm64/bhyve/vmm
actually landing in main), we have to maintain our own for the time
being.

Tweak the config to work around two problems which arose after the
latest update:
- EFI support implies SMBIOS support, which requires that we implement a
  finalizer, which we don't have.  Since SMBIOS support isn't required,
  just remove it.
- Don't configure EVENT, as we don't use it, and its configuration
  implies that we implement a hook that runs immediately before command
  processing.

While here, incorporate a patch from jrtc27 which permits booting from
images formatted using an MBR.

Reviewed by:	manu, jrtc27
Sponsored by:	Innovate UK
Differential Revision:	https://reviews.freebsd.org/D43784
Differential Revision:	https://reviews.freebsd.org/D43785

sysutils/u-boot-*: Update to 2024.01

Sponsored by:	Beckhoff Automation GmbH & Co. KG

sysutils/u-boot-bhyve-arm64: Fix the GIC redistributor size

This is needed when booting multi-vCPU guests.

Reviewed by:	manu
Obtained from:	jrtc27
Sponsored by:	Innovate UK
Differential Revision:	https://reviews.freebsd.org/D42995

sysutils/u-boot-bhyve-arm64: New port

This is a port of https://github.com/zxombie/u-boot/tree/bhyvearm64 to
the version of u-boot in the ports tree.  There is a bhyve arm64 port
that is close to landing, so now seems like a good time to make the port
available.

In the longer term we would upstream this platform in some form, but
since arm64 bhyve is experimental, I think trying to upstream at this
point is premature.  Of course, we prefer not to carry patches in the
ports tree when possible, but in this case it seems justified to do so
for some time, to give users a change to test and report problems.

Approved by:	manu
Sponsored by:	Innovate UK
Sponsored by:	Klara, Inc. (hardware)
Differential Revision:	https://reviews.freebsd.org/D42437