hw: Disable AXI splitting checks in AXI-RT

[thommythomaso]

This addresses one point in #4 of AXI-RT.

[paulsc96]

Please

• Extend the Xilinx top wrapper, since this parameter has a nonzero default. On that note, maybe it is better to invert the parameter to an enable semantic if erroneously enabling these checks is considered a bug.
• Amend the documentation.

[alex96295]

Same as Paul, for the rest LGTM

[thommythomaso]

Please

* Extend the Xilinx top wrapper, since this parameter has a nonzero default. On that note, maybe it is better to invert the parameter to an enable semantic if erroneously enabling these checks is considered a bug.

* Amend the documentation.

Enabling it is not a bug. The current parameter solution should be seen as a temporary solution that will eventually be replaced when redesigning the burst splitter. The new parameter defaults to 0, no changes are required to the xilinx wrapper.

[alex96295]

LGTM