[ALSA] Add new pci device id (SB400) to atiixp-modem

ATIIXP-modem driver
I didn't actually test whether the modem works, but at least the driver
loads and initializes fine.  Please consider inclusion.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/atiixp_modem.c

@@ -265,6 +265,7 @@ struct snd_atiixp {
  */
 static struct pci_device_id snd_atiixp_ids[] = {
 	{ 0x1002, 0x434d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* SB200 */
+	{ 0x1002, 0x4378, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* SB400 */
 	{ 0, }
 };