Debug units and fixes for real hardware, just getting started
Added FMC Power Good signal. Set configuration to BPI x16 and enabled Bitstream compression
Merge remote-tracking branch 'origin/master' into soc

Conflicts:
	rtl/orpsoc/orpsoc.sv
ORPSoC part works on hardware.

- Removed timescale options from mexiko files
- Use emergency clk for now (80 MHz)
- Constrain system clock
- Updated design to use 80 MHz system clock and 115200 baud.

Known issues:
The bootrom cannot update the divisior for UART so we're
forced to use the builtin standard ones. No big deal, but
must be fixed eventually.
Bootrom Makefile should depend on config
Merge branch 'master' of github.com:bluecmd/mexiko