Add the PCI IDs for Intel Comet Lake, Ice Lake, and Gemini Lake PCHs.
This patch was built using the same logic as my Cannon Lake patch, however this patch is untested as I lack hardware with Comet Lake and Ice Lake, so other people will need to test this patch.
Inspired by Linux commits d4c2ccdb5855ce8786ebc66f7405096065d0c198 (Comet Lake) and 491f833134ac474434e1c950925c58b2ac13ca72 (Ice Lake).
Also, thanks to Scott Long for the Gemini lake and hdacc.c changes.