software/fpga: remove unused imports
software/fpga: Fix BIST simulation
software/fpga: Rewrite Sdram->SDRAM, Bist->BIST
software/fpga: move ULPI_DATA record to ov_types
software/fpga: Move/cleanup more tests

	- Move in-file ovhw tests to sim
	- Fix + rebuild tests so they work + for more error checking