P2: sync code with Anan 100D

Changes to protocol 2 gateware:

• sync the radio gateware with the latest upstream Anan 100D code (12.1)
• fix TX issue (bad "phase" changes during the tune status)
• adjust RGMII timing to maximise stability with switches/wifi and virtual machine
• optimise the protocol 2 gateware
• lower a bit of gain in the line out of audio (TLV320): more range in the AF slider with hearphone
• remove unused files
• upgrade IPs to Quartus 19.1

Changes:

• use Makefile to build the gatewares

NOTE: You don't need to update the mcu code to use these gatewares.
For documentation read the README.org in the various folder.

Files:

• programmer-0.1.0.exe: use in windows to interact with the bootloader
• mcu-3.0.hex: firmware to flash into the MCU
• bootloader-3.0.pof: FPGA bootloader to load through JTAG
• odyssey2-12.11_P2.rbf: gateware with protocol 2 (1000MBit/s only)
• odyssey2-6.01_P1.rbf: gateware with protocol 1 (100MBit/s only)