isdn/hisax: fix compiler warning on hisax_pci_tbl

Annotate hisax_pci_tbl as '__used' to fix following warning:

  CC      drivers/isdn/hisax/config.o
drivers/isdn/hisax/config.c:1920: warning: ‘hisax_pci_tbl’ defined but not used

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/isdn/hisax/config.c b/drivers/isdn/hisax/config.c
index b133378..c110f86 100644
--- a/drivers/isdn/hisax/config.c
+++ b/drivers/isdn/hisax/config.c
@@ -1917,7 +1917,7 @@
 #ifdef CONFIG_PCI
 #include <linux/pci.h>
 
-static struct pci_device_id hisax_pci_tbl[] __devinitdata = {
+static struct pci_device_id hisax_pci_tbl[] __devinitdata __used = {
 #ifdef CONFIG_HISAX_FRITZPCI
 	{PCI_VDEVICE(AVM,      PCI_DEVICE_ID_AVM_A1)			},
 #endif