feat: enhance DMA and RIB functionality with burst support and performance tests

- Updated dma_error_tb to implement burst transfer handling and performance measurement for INCR4 transfers.
- Introduced rib_burst_bus_tb to validate RIB burst arbitration and protocol compliance.
- Added soc_rib_burst_ram_tb to test SRAM behavior with burst commands.
- Created spill_register_tb to verify the functionality of the spill register under various conditions.
- Modified test_dma.py to reflect changes in DMA error handling and performance reporting.
- Updated test_memory_map.py to include new RIB burst interfaces and spill register utilities.
- Enhanced test_rib_burst.py with directed tests for RIB burst building blocks and spill register behavior.
- Adjusted test_soc_topology.py to ensure correct instantiation counts for RIB interfaces.
- Improved test_user_extensions.py to validate the generation of isolated scalar bindings for burst interfaces.

tests/test_soc_topology.py

@@ -87,7 +87,9 @@ def test_topology_generates_complete_rib_apb_and_gpio_bindings(tmp_path: Path) -
     assert "assign tmr.paddr = rib.addr;" in apb_routes
     assert "({32{s_psel_q[8]}} & tmr.prdata)" in apb_response
     assert "localparam int NSLV = 10;" in apb_declarations
-    assert fabric.count("rib_if u_") == 5
+    assert fabric.count("soc_rib_if u_") == 1
+    assert fabric.count("soc_rib_burst_if u_") == 3
+    assert fabric.count("rib_if u_") == 2
     assert ".mgmt_rib(u_mgmt_rib_if)" in bus_fabric
     assert ".user_rib(u_user_rib_if)" in bus_fabric
     assert ".apb_rib(u_apb_rib_if)" in bus_fabric