spl: sdp: Pass the USB index to board_usb_init()

board_usb_init() should receive the controller_index as its
first parameter instead of having it hardcoded as 0.

All in-tree users have CONFIG_SPL_SDP_USB_DEV as 0, so this error
should not affect any board.

Fix it by passing controller_index as the parameter of board_usb_init().

Signed-off-by: Fabio Estevam <festevam@denx.de>
Acked-by: Peng Fan <peng.fan@nxp.com>
diff --git a/common/spl/spl_sdp.c b/common/spl/spl_sdp.c
index 36c31af..cc4fb4f 100644
--- a/common/spl/spl_sdp.c
+++ b/common/spl/spl_sdp.c
@@ -19,7 +19,7 @@
 
 	usb_gadget_initialize(controller_index);
 
-	board_usb_init(0, USB_INIT_DEVICE);
+	board_usb_init(controller_index, USB_INIT_DEVICE);
 
 	g_dnl_clear_detach();
 	ret = g_dnl_register("usb_dnl_sdp");