Fix colorlight 5a 75b v6.1 flash pins

As with the other versions, the clk pin can't be directly driven

QMTech EP4CE15: Add daughterboard support, small DECA addition

Add digilent basys3 board support

CYC1000: Add initial support of CYC1000 board

icebreaker/fomu: Update flashing and disconnect reset from SoC (will need proper support in iCE40PLL).

Qmtech xc7a35t

icesugar: map the usb port

muselab_icesugar: first basic version which boots

add QMTECH XC7A35T core board + daughter board

Lattice iCE40 UltraPlus Breakout board (iCE40UP5K-B-EVN) added

Mini Monitor 4K and Mini Recorder 4K are almost the same hardware with just changes on
the Video In/Out. For now tests have been done on the Mini Monitor 4K, but the aim  is
support both boards in the same platform/target in the future, thus the mini_4k naming.

These boards could be used as affordable Artix7 dev boards for LiteX, to run Linux with
LiteX (512MB of RAM + a Video Framebuffer) or to create custom systems like a fast software
defined signal generator/recorder directly from a PC over PCIe, custom HDMI/SDI video
cards, etc... lots of possibilities :)

Minor fixes for AU280 [work in progress]

terasic_sockit: fix: make video clock also optional as video terminal is optional

antmicro_lpddr4_test_board: fix ethernet rx delay issue