Drivers: hv: vmbus: Use PCI_VENDOR_ID_MICROSOFT for better discoverability

pci_ids.h already defines PCI_VENDOR_ID_MICROSOFT, and is included via
linux/pci.h. Use the define instead of the magic number.

Signed-off-by: Easwar Hariharan <easwar.hariharan@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/1663625084-2518-2-git-send-email-eahariha@linux.microsoft.com


Signed-off-by: Wei Liu <wei.liu@kernel.org>