HP9000/382 and 362 framebuffer now use MI sti(4) driver

Hi,

I've committed changes to make framebuffers on HP9000/382 and 362
use MI sti(4) driver with mmap(2) support.

 https://mail-index.netbsd.org/source-changes/2025/05/01/msg156716.html
 > Add sti(4) support for 9000/362 and 9000/382 on-board framebuffers.

 https://mail-index.netbsd.org/source-changes/2025/05/25/msg157020.html
 > Add mmap(2) support to sti(4) for 362 and 382 framebuffers.

With these changes, X.org server (and other framebuffer applications
like mlterm-wscons etc.) work on 382 and 362.
 https://x.com/tsutsuii/status/1926641342035177488

Have fun,
---
Izumi Tsutsui