rnndb/pci: Document Pascal PCI MSI rearm register (CYA_2)
nvgpu documents that writing a dummy value 0 to this register rearms
PCI MSI on Pascal.
<bitfield pos="0" name="TRIGGER"/>
<bitfield low="1" high="11" name="TIME"/>
</reg32>
+ <reg32 offset="0x704" name="CYA_2" variants="GF100-"/><!-- write dummy value 0 to rearm PCI MSI on Pascal -->
</group>
<group name="nv_pci_hda">
