Add support for the Silicon Image "Ultra ATA-133 Host Controller"

This patch was tested with the following card:
  IDE interface: Silicon Image, Inc. PCI0680 Ultra ATA-133 Host Controller [1095:0680] (rev 02)

Change-Id: I988b73684b54942d8ee6e44a9319dcc54086fca7
Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@no-log.org>
Reviewed-on: http://review.coreboot.org/12171
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/drivers/sil/3114/sil_sata.c

@@ -45,3 +45,9 @@ static const struct pci_driver si_sata_driver __pci_driver = {
         .vendor = 0x1095,
         .device = 0x3114,
 };
+
+static const struct pci_driver si_sata_driver_2 __pci_driver = {
+	.ops    = &si_sata_ops,
+	.vendor = 0x1095,
+	.device = 0x0680,
+};