musb: properly detect failed initialization of controller

We want to check the result of musb_init_controller
and not the address were the result is stored.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/drivers/usb/musb-new/musb_uboot.c b/drivers/usb/musb-new/musb_uboot.c
index ea71f75..8662c0f 100644
--- a/drivers/usb/musb-new/musb_uboot.c
+++ b/drivers/usb/musb-new/musb_uboot.c
@@ -446,7 +446,7 @@
 	}
 
 	*musbp = musb_init_controller(plat, (struct device *)bdata, ctl_regs);
-	if (!musbp) {
+	if (!*musbp) {
 		printf("Failed to init the controller\n");
 		return -EIO;
 	}