dm: tegra: usb: Move USB to driver model

Somehow this change was dropped in the various merges. I noticed when I
came to turn off the non-driver-model support for Tegra. We need to make
this change (and deal with any problems) before going further.

Change-Id: Ib9389a0d41008014eb0df0df98c27be65bc79ce6
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Marek Vasut <marex@denx.de>

arch/arm/mach-tegra/Kconfig

@@ -24,6 +24,9 @@ config SYS_MALLOC_F_LEN
 config USE_PRIVATE_LIBGCC
 	default y
 
+config DM_USB
+	default y
+
 config SPL_DM
 	default y
 

arch/arm/mach-tegra/board2.c

@@ -161,7 +161,9 @@ int board_init(void)
 
 #ifdef CONFIG_USB_EHCI_TEGRA
 	pin_mux_usb();
+# ifndef CONFIG_DM_USB
 	usb_process_devicetree(gd->fdt_blob);
+# endif
 #endif
 
 #ifdef CONFIG_LCD