usb: add host support for the tilegx architecture

This change adds OHCI and EHCI support for the tilegx's on-chip
USB hardware.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 800be38..1d9401e 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1349,6 +1349,11 @@
 #define PLATFORM_DRIVER		ehci_msm_driver
 #endif
 
+#ifdef CONFIG_TILE_USB
+#include "ehci-tilegx.c"
+#define	PLATFORM_DRIVER		ehci_hcd_tilegx_driver
+#endif
+
 #ifdef CONFIG_USB_EHCI_HCD_PMC_MSP
 #include "ehci-pmcmsp.c"
 #define	PLATFORM_DRIVER		ehci_hcd_msp_driver