This is an API that allows creating mock block controllers, to write
unit tests for block controllers. See rfnoc_blocks_test for an example
how to use them.
- Adding client_zero class, which gathers information about our device
form the global registers on port 0 of the RFNoC backend registers.
- adding unit tests to exercise client_zero
- mock_reg_iface class: adding fake register_iface so we can run
unit tests in software only
Co-authored-by: Martin Braun <martin.braun@ettus.com>
