mvsas: check subsystem id

add support for mv6480 chip which subsystem id is 6480 in spite of device id is 6440.

---
drivers/scsi/mvsas.c | 9 +++++++++

1 files changed, 9 insertions(+), 0 deletions(-)

index b5de3d0..e55b903 100644
@@ -3163,6 +3163,15 @@ static struct sas_domain_function_template mvs_transport_ops = {

static struct pci_device_id __devinitdata mvs_pci_table[] = {
    { PCI_VDEVICE(MARVELL, 0x6320), chip_6320 },
    { PCI_VDEVICE(MARVELL, 0x6340), chip_6440 },
+    {
+        .vendor     = PCI_VENDOR_ID_MARVELL,
+        .device     = 0x6440,
+        .subvendor    = PCI_ANY_ID,
+        .subdevice    = 0x6480,
+        .class        = 0,
+        .class_mask    = 0,
+        .driver_data    = chip_6480,
+    },
    { PCI_VDEVICE(MARVELL, 0x6440), chip_6440 },
    { PCI_VDEVICE(MARVELL, 0x6480), chip_6480 },

1.5.4