sdp: call board_usb_init at spl_sdp_load_image

Need initialize UDC before run sdp download

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/common/spl/spl_sdp.c b/common/spl/spl_sdp.c
index e7f7b68..ae9c098 100644
--- a/common/spl/spl_sdp.c
+++ b/common/spl/spl_sdp.c
@@ -19,6 +19,8 @@
 
 	usb_gadget_initialize(controller_index);
 
+	board_usb_init(0, USB_INIT_DEVICE);
+
 	g_dnl_clear_detach();
 	ret = g_dnl_register("usb_dnl_sdp");
 	if (ret) {