We don't set this field using the XML codegen, but this would help us
decode the right value in case of 16x (VG) oversampling.
<field name="Coverage Read Mode" size="1" start="11" type="uint"/>
<!-- add values -->
<field name="Coverage Pipe Select" size="1" start="8" type="bool"/>
- <field name="Rasteriser Oversample Mode" size="2" start="6" type="bool"/>
+ <field name="Rasteriser Oversample Mode" size="2" start="6" type="uint"/>
<!-- add values -->
<field name="Coverage Read Type" size="1" start="5" type="uint"/>
<!-- add values -->