Sync with -current.
An experiment for LUNA-88K 4bpp support, based on NetBSD/luna68k by @tsutsuii.
Initial commit, but seems does not work yet...
Specify the capabilities explicitly.
Now we can use colored characters by ANSI escape sequence on wscons console:-)
Enlarge mmap limit, to map 4 or 8bpp frame buffer memory.
Merge branch 'aoyama-colorfb' of https://github.com/ao-kenji/obsd-luna88k into aoyama-colorfb

Conflicts:
	dev/lunafb.c
	luna88k/pmap_table.c