NAS-140683 / 27.0.0-BETA.1 / Add support for ARM build

[Qubad786]

No description provided.

[bugclerk]

Jira URL: https://ixsystems.atlassian.net/browse/NAS-140683

[ixhamza]

Since this is the stock Debian configuration fetched from http://ftp.debian.org/debian/pool/main/l/linux/linux-config-6.18_6.18.15-1~bpo13+1_arm64.deb, similar to what we already use for x86, it should be good as a first pass. That said, I think we'll need to later take a careful look at truenas.config, since it contains some x86-specific options. They should be no-ops on ARM, but still worth reviewing. There are also a few options (e.g. CONFIG_ARCH_FORCE_MAX_ORDER) that apply to both arches but whose values were tuned with x86 in mind, so those may need rethinking for ARM as well.

[bugclerk]

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