rockchip: Rock960: fix up USB support

Fix up USB config options so keyboards and other USB devices work.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Reviewed-by: Kever Yang<kever.yang@rock-chips.com>
Change-Id: I34b0696e0ac7303186f20c83278dde340399b690
diff --git a/include/configs/rock960_rk3399.h b/include/configs/rock960_rk3399.h
index c6f9122..2edad71 100644
--- a/include/configs/rock960_rk3399.h
+++ b/include/configs/rock960_rk3399.h
@@ -15,4 +15,6 @@
 
 #define SDRAM_BANK_SIZE			(2UL << 30)
 
+#define CONFIG_USB_OHCI_NEW
+#define CONFIG_SYS_USB_OHCI_MAX_ROOT_PORTS     2
 #endif