gdt: remove unnecessary #defines

Remove PCI vendor IDs, as they are already defined in pci_ids.h.

Signed-off-by: Jon Mason <jdmason@kudzu.us>
Cc: Achim Leubner <achim_leubner@adaptec.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>