at91: move usb driver to drivers/usb

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/include/configs/at91sam9261ek.h b/include/configs/at91sam9261ek.h
index 4d50932..d6d140a 100644
--- a/include/configs/at91sam9261ek.h
+++ b/include/configs/at91sam9261ek.h
@@ -143,6 +143,7 @@
 #define CONFIG_RESET_PHY_R		1
 
 /* USB */
+#define CONFIG_USB_ATMEL
 #define CONFIG_USB_OHCI_NEW		1
 #define CONFIG_DOS_PARTITION		1
 #define CONFIG_SYS_USB_OHCI_CPU_INIT		1