Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Remove some stray traces of KMODDEPS

Use a consistent style and one much closer to the rest of /usr/src

We don't use += for SRCS in Makefiles, we simply use the
line continuation character and state the rest of the sourcefiles
on the next line.

Fix typo.

Pointed out by: Motomichi Matsuzaki <mzaki@e-mail.ne.jp>

Add the VESA S3 linear framebuffer driver. It works on top of VESA by replacing
the video switch by another. Exactly as VESA does on top of VGA.

It adds linear framebuffer to S3 VESA 1.2 cards.

Obtained from: The original S3 ISA code comes from
Peter Horton <pdh@colonel-panic.com>