dm: tegra: Convert USB setup to livetree

Adjust this code to support a live device tree. This should be implemented
as a PHY driver but that is left as an exercise for the maintainer.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Stephen Warren <swarren@nvidia.com>
diff --git a/arch/arm/mach-tegra/board2.c b/arch/arm/mach-tegra/board2.c
index 6b5fa7d..181dc30 100644
--- a/arch/arm/mach-tegra/board2.c
+++ b/arch/arm/mach-tegra/board2.c
@@ -166,7 +166,7 @@
 	pin_mux_nand();
 #endif
 
-	tegra_xusb_padctl_init(gd->fdt_blob);
+	tegra_xusb_padctl_init();
 
 #ifdef CONFIG_TEGRA_LP0
 	/* save Sdram params to PMC 2, 4, and 24 for WB0 */