ibexpeak/ehci: Set .enable_resources properly.

Without this memory decoding isn't activated which, in turn,
makes SeaBIOS crash.

Change-Id: I3dcc721b500ab7468e1082157eeeed38044462d0
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/5326
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Tested-by: build bot (Jenkins)

src/southbridge/intel/ibexpeak/usb_ehci.c

@@ -84,6 +84,7 @@ static struct pci_operations lops_pci = {
 static struct device_operations usb_ehci_ops = {
 	.read_resources = pci_ehci_read_resources,
 	.set_resources = pci_dev_set_resources,
+	.enable_resources	= pci_dev_enable_resources,
 	.init = usb_ehci_init,
 	.scan_bus = 0,
 	.ops_pci = &lops_pci,