Set up VGA connection on the MCU

Specifically take the remaining 11 GPIO pins
and 5 pins from the EBI adress line and conect
them to the VGA harness
Reduce EBI adress and propagate to FPGA

Reduce A[27..00]
(which was wrong, it should have been 26)
to A[21..0] on account of the 5 removed lines.
Then removed the appropriate lines from the EBI
backup header and finally, also the FPGA
connections
Reconnect removed FPGA connections to headers

I addition, finish some details on EBI connection
and finalize
Merge pull request #50 from dmpro2014/vga-mcu

Vga mcu