Remove global package imports

[WRoenninger]

This PR removes the global package imports of axi_pkg in synthesizable modules. I ran into issues with Verilator, where the global namespace was broken due to the package defining resp_t and subsequest modules defining a parameter resp_t in thier definition.
I further did some port naming cleanup and removed interfaces which are no longer used by the modules in this repo.
Changes:

Added

• axi_cdc: Add AXI4-Lite interface wrap.
• axi_intf: Add AXI4-Lite prot_t signal, adapted macros accordingly.

Changed

• axi_cdc: Change ports src and dst to slv and mst.
• axi_cut: Change ports in and out to slv and mst.
• axi_multicut: Change ports in and out to slv and mst.
• axi_intf: Removed global import axi_pkg::*;, made package calls explicit.
• tb_axi_cdc: Removed global import, add typedef macros.

Fixed

• axi_cut: Add missing AXI_LITE_ASSIGN macros in axi_lite_cut_intf.

Removed

• axi_cdc: Removed unused global import of axi_pkg.
• axi_intf: unused interface AXI_ROUTING_RULES
• axi_intf: unused interface AXI_ARBITRATION

Currently the tb_atop_filter is broken in this PR, should however be related to #67.

[zarubaf]

Thanks. I am unsure about the re-naming of the ports. I can see two paths:

• Either we agree on some common port names (that should then go into CONTRIBUTING.md)
• or we keep them as they are right now.

In any case I would suggest we don't try to fix too many "problems" in one PR. I would re-factor the changes and only address the Verilator things in a first short (this can go out as a hot-fix). Then we can have a separate discussion about the port naming convention.

[andreaskurth]

I agree with @zarubaf. Please split the changes.

[fabianschuiki]

I also agree on having a quick hotfix, and then get back to any naming conventions later.

[WRoenninger]

Removed the port naming changes from this PR.
However I left the removal of the two interfaces in as they were used in the old axi_lite_xbar and should no longer be used.

[andreaskurth]

Thanks for these fixes, highly appreciated!

Several of your commits mixed changes in one file (e.g., adding _intf variant and fixing macro spacing). That makes it hard to split them if we are in agreement on one part of the changes but not on the other.

I have refactored your macro spacing fixes to a separate branch. I also agree with them, but we need to fix all occurrences, not just some. Please finish that work in #71.

[andreaskurth]

Benches passing. Merging.