From: Paul Mundt <lethal@linux-sh.org>

This patch adds support for the Kyro graphics boards (STG4000/PowerVR
3/etc= .) to 2.6.  This is a direct port and substantial cleanup / rewrite
of the 2.4 driver that's available in the sh64 tree at linux-sh.bkbits.net.

Some of the overlay code and the STG4000 bits are still a bit ugly, so be
forewarned.