Enable AX102 tweaks

[bretton]

Simple solution for Issue #100 and AX102 servers.

If running bsdinstall manually, then in final step exit to shell and run tweak_ax102.sh to set required parameters.

If running the unattended install, configure tweak_ax102="1" in depenguin_settings.sh to enable required parameters.

Passing in smbios options to qemu doesn't seem practical as limited useful info when checking DMI values.

[bretton]

1. for tweak_ax102.sh, run after installer but before reboot (exit to shell to make changes) - is it necessary to mount the filesystem somewhere for the changes first?

2. test images available for testing AX102 adjustments. May be replaced by future test images.

for 13.5-rc1 test

wget https://depenguin.me/qa.sh
chmod +x qa.sh
./qa.sh <your ssh key url>

for 14.3-rc1 test

wget https://depenguin.me/qa2.sh
chmod +x qa2.sh
./qa2.sh <your ssh key url>

will test on ax102 and ax41 servers and confirm works.

3. for depenguin-run script, we can do a CPU check and alert to tweaks required when CPU matches specific CPU models

[bretton]

unattended installer works fine for 14.3, boots with AX102 tweaks enabled.

however manually running bsdinstall doesn't have the file tweak_ax102.sh available in the filesystem during "exit to shell to make final tweaks" step. How can we make it available? Else steps have to be run manually.

[bretton]

we will need a special INSTALLERCONFIG.ax102 script which copies tweak_ax102.sh to /root/tweak_ax102.sh inside the chroot, and then run bsdinstall script ./INSTALLERCONFIG.ax102 for ax102 hosts.

this seems redundant with the unattended installer already doing the required steps.

[bretton]

if no objections, I'm going to take this one live, complete testing with live images, as I want to get a 15.0 installer completed too

[bretton]

live images tested for 13.5, 14.3 installs on AX41 and AX102 using unattended installer, all good.

will get a PR up for 15.0 installer image soon