rnndb/pmc: Document PVDEC bitfield of PMC.{ENABLE|INTR_*}
Based in part upon [0] and IRC discussion November 22, 2017.
[0]
<bitfield pos="16" name="PVENC" variants="GK104-" />
<bitfield pos="17" name="PVP2" variants="G84:G98 G200:MCP77"/>
<bitfield pos="17" name="PPDEC" variants="G98:G200 MCP77:GM107"/>
- <bitfield pos="17" name="PUNK084" variants="GM107-"/>
+ <bitfield pos="17" name="PVDEC" variants="GM107-"/>
<bitfield pos="18" name="PDAEMON" variants="GT215:GF100"/>
<bitfield pos="18" name="PTHERM" variants="GF100-"/>
<bitfield pos="19" name="PTHERM" variants="GT215:GF100" />
<bitfield pos="14" name="PUNK087" variants="GM107-"/>
<bitfield pos="15" name="PBSP" variants="G84:G98 G200:MCP77"/>
<bitfield pos="15" name="PVLD" variants="G98:G200 MCP77:GM107"/>
- <bitfield pos="15" name="PUNK084" variants="GM107-"/>
+ <bitfield pos="15" name="PVDEC" variants="GM107-"/>
<bitfield pos="16" name="PRM" variants="NV1"/>
<bitfield pos="16" name="PTIMER" variants="NV3-"/>
<bitfield pos="17" name="PVP2" variants="G84:G98 G200:MCP77"/>
