Follows most of the changes made to the gint driver system.
* Replace test gint/switch with a new test gint/drivers which shows
driver metadata, flags, and world states.
* Enable the DMA Control test on SH4-based fx-9860G.
* Enable the Memory Speed test on SH4-based fx-9860G.
* Enable the Memory Speed test on SH3-based fx-9860G although there's
barely anything useful for that platform.
* Update all tests to the GINT_CALL API when useful.
* Use public world buffers and public driver state structures to show
world states without having to coordinate the gint and gintctl code.
