[Bug 283231] Intel Coffee Lake (Intel HD Graphics 630) + drm_kmod broken in 14.2

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=283231

            Bug ID: 283231
           Summary: Intel Coffee Lake (Intel HD Graphics 630) + drm_kmod
                    broken in 14.2
           Product: Base System
           Version: 14.2-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: sean@seanmarkham.com

Intel Coffee Lake (Intel HD Graphics 630) + drm_kmod broken in 14.2

I have been encountering some issues trying to run anything Xorg-related using
the drm_kmod drivers (sysrc kld_list+=i915kms) on a brand-new install of FBSD
14.2-Release. 

Attempting to run startx or xinit produces an error "Cannot run in framebuffer
mode" (instead of the X session starting).

Said error code is similar to the one posted on this SE post
(https://unix.stackexchange.com/questions/615263/cannot-run-in-framebuffer-mode-please-specify-busids),
but I don't have the exact one because of the way I fixed it.

Fix: reinstalling on FBSD 14.1-RELEASE seems to do the trick.


~~Technical Specs: (after reverting to 14.1)
```                        `        sean@seanBSDv
  ` `.....---.......--.```   -/     -------------
  +o   .--`         /y:`      +.    Host: 30C7001GUS (ThinkStation P330)
   yo`:.            :o      `+-     Kernel: FreeBSD 14.1-RELEASE
    y/               -/`   -o/      Uptime: 7 mins
   .-                  ::/sy+:.     Packages: 680 (pkg)
   /                     `--  /     Shell: zsh 5.9
  `:                          :`    Display (MSI MP223 E2): 1920x1080 @ 60 Hz
i]
  `:                          :`    DE: Mate 1.28.1
   /                          /     WM: Marco (X11)
   .-                        -.     WM Theme: TraditionalOk
    --                      -.      Theme: TraditionalOk [GTK2/3/4]
     `:`                  `:`       Icons: mate [GTK2/3/4]
       .--             `--.         Font: Sans (10pt) [GTK2/3/4]
          .---.....----.            Cursor: mate (24px)
                                    Terminal: mate-terminal 1.28.1
                                    Terminal Font: Monospace (10pt)
                                    CPU: Intel(R) Core(TM) i5-8500 (6) @ 4.10
Gz
                                    GPU: Intel UHD Graphics 630 [Integrated]
                                    Memory: 4.34 GiB / 7.80 GiB (56%)
                                    Swap: 0 B / 8.00 GiB (0%)
                                    Disk (/): 3.57 GiB / 421.70 GiB (1%) - zfs
                                    Disk (/zroot): 96.00 KiB / 418.14 GiB (0%)
s
                                    Local IP (em0): 192.168.1.161/24
                                    Locale: C.UTF-8

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