Add AXI/APB BFM and UVM RAL generator

[Taichi Ishitani]

Hi,

I'm developing some OSS VIP and tool.
Could you please add my works to your list?

• tvip-axi
  • Bus function model for AMBA AXI protocol
  • Written in SystemVerilog and UVM
  • https://github.com/taichi-ishitani/tvip-axi
  • License: Apache-2.0
• tvip-apb
  • Bus function model for AMBA APB protocol
  • Written in SystemVerilog and UVM
  • https://github.com/taichi-ishitani/tvip-apb
  • License: Apache-2.0
• RgGen
  • Code generator tool for CSR (configuration and status register)
    • Generating UVM RAL model from register map specification
  • Written in Ruby
  • https://github.com/rggen/rggen
  • License: MIT

[Ben Marshall]

Hi, thanks a lot for submitting these :)

[Taichi Ishitani]

Thanks for adding my works！