soc/amd/stoneyridge: Add ST/CZ SMBus device id

The SMBus PCI device ID for Stoney wasn't updated when the code was
pulled over from hudson.  This means that the IOAPIC wasn't being
initialized in coreboot.

BUG=b:74070580
TEST=Boot Grunt, see IOAPIC init messages in console.

Change-Id: Ida5d3f3592488694681300d79444c1e26fff6a1a
Signed-off-by: Martin Roth <martinroth@chromium.org>
Reviewed-on: https://review.coreboot.org/24930
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/stoneyridge/sm.c

@@ -123,5 +123,5 @@ static struct device_operations smbus_ops = {
 static const struct pci_driver smbus_driver __pci_driver = {
 	.ops = &smbus_ops,
 	.vendor = PCI_VENDOR_ID_AMD,
-	.device = PCI_DEVICE_ID_AMD_SB900_SM,
+	.device = PCI_DEVICE_ID_AMD_CZ_SMBUS,
 };