- Fix the AXI ID width for the CLINT (previously `4`, now `5`)
- Parametrise the CLINT's AXI types
- Deprecate `axi_[master|slave]_connect` and move to AXI assign macros,
  as they allow arbitrary AXI types

Signed-off-by: Nils Wistoff <nwistoff@iis.ee.ethz.ch>