drm: Propagate CPPFLAGS.drmkms into all the drm drivers.

drm: Make via build again.

Narrow the CPPFLAGS for drm subsystems.

No need for the whole kernel to be built with -I flags for the drm
header files.

branches: 1.3.16;
Just use `drm' for DRM/UMS PCI attachments at PCI devices.

It'll make life simpler. No need to distinguish drm from drm2 here
because it's just an interface attribute, no content, and we use it
compatibly: parent provides pci_attach_args.

Make viadrm (UMS) almost build.

Missing part: something needs to issue config_found_ia("drmums_pci"),
and config(5) needs to be told that it will do that. The sensible
approach is for vga_pci to do so. But config(5) doesn't seem to
understand that *only* vga_pci will do that, not all vga.

The old scheme was to tell config(5) that vga would always attach
drm, and actually attach it in vga_pci, and hope that nobody would
ever consider trying to attach non-PCI devices but quietly leave the
token `pci' out of the name of the drm interface attribute so it
didn't look wrong to have it outside dev/pci/files.pci.

Maybe that's still the right thing, as far as anything UMS can be
right.

branches: 1.1.2; 1.1.4;
Partial viadrm2 snapshot.

To do:

- autoconf attachment (shouldn't be hard)
- viafb (maybe steal unichromefb and adapt attachment structure)
- actually run it (no hardware here)

Remove last users of drmP.h.

Move decl of drm_guarantee_initialized to drmP.h.

Eliminate drm_pci_init/exit. Empty for a while, no need.

branches: 1.2.16; 1.2.18; 1.2.20;
viadrmkms is not i915drmkms; from Vicente Chaves in PR 50103.

branches: 1.1.2;
Add the missing viadrm files omitted last night.

drm: Make via build again.

Remove last users of drmP.h.

Add aprint_*() newlines for viadrmums(4) attach

From Andrius V in kern/55884

branches: 1.4.2;
viadrmums: Stop gracefully at the end of the PCI id list.

Call linux_pci_dev_init/destroy in viadrmums(4) too.

branches: 1.2.2; 1.2.18; 1.2.20; 1.2.22;
Empty suspend/resume handler for viadrmums.

Add the missing viadrm files omitted last night.