sandbox: video: Replace PCI_CLASS_* macros by one from pci_ids.h

Replace old macros PCI_CLASS_CODE_COMM and PCI_CLASS_SUB_CODE_COMM_SERIAL
by new macros defined in pci_ids.h. Old macros would be deleted in followup
commit.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>