'BUG: kernel NULL pointer dereference' when loading Xe KMD without firmware blobs

I know that Xe KMD requires firmwares to work but when it is not available it should fail driver load without causing kernel NULL pointer dereference and other errors that it current have.

• Make sure it doesn't crash when loading without GuC
• Make sure it doesn't crash when loading without HuC
• Make sure it doesn't crash when loading without GSC