x86: ivybridge: Set up EHCI USB

Add init for EHCI so that USB can be used.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/include/asm/arch-ivybridge/bd82x6x.h b/arch/x86/include/asm/arch-ivybridge/bd82x6x.h
index 644755f..2e6a079 100644
--- a/arch/x86/include/asm/arch-ivybridge/bd82x6x.h
+++ b/arch/x86/include/asm/arch-ivybridge/bd82x6x.h
@@ -10,6 +10,7 @@
 void bd82x6x_sata_init(pci_dev_t dev, const void *blob, int node);
 void bd82x6x_sata_enable(pci_dev_t dev, const void *blob, int node);
 void bd82x6x_pci_init(pci_dev_t dev);
+void bd82x6x_usb_ehci_init(pci_dev_t dev);
 int bd82x6x_init_pci_devices(void);
 int bd82x6x_init(void);