serial: add ADDI-DATA GmbH PCI-Express communication cards in 8250_pci.c and pci_ids.h

Add support for ADDI-DATA GmbH PCI-Express communication cards:

APCIe-7300
APCIe-7420
APCIe-7500
APCIe-7800

Warning: 8250_pci.c depends on pci_ids.h. 8250_pci.c

Signed-off-by: Krauth Julien <Krauth.Julien@addi-data.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>