tegra: usb: Add support for Tegra USB peripheral

This adds basic support for the Tegra2 USB controller. Board files should
call board_usb_init() to set things up.

Configuration is performed through the FDT, with aliases used to set the
order of the ports, like this fragment:

        aliases {
		/* This defines the order of our USB ports */
                usb0 = "/usb@0xc5008000";
                usb1 = "/usb@0xc5000000";
        };

drivers/usb/host files ONLY: Acked-by: Remy Bohmer <linux@bohmer.net>
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/arch/arm/include/asm/arch-tegra2/tegra2.h b/arch/arm/include/asm/arch-tegra2/tegra2.h
index 8941443..baae2eb 100644
--- a/arch/arm/include/asm/arch-tegra2/tegra2.h
+++ b/arch/arm/include/asm/arch-tegra2/tegra2.h
@@ -41,6 +41,8 @@
 #define TEGRA2_SPI_BASE		(NV_PA_APB_MISC_BASE + 0xC380)
 #define NV_PA_PMC_BASE		0x7000E400
 #define NV_PA_CSITE_BASE	0x70040000
+#define TEGRA_USB1_BASE		0xC5000000
+#define TEGRA_USB3_BASE		0xC5008000
 
 #define TEGRA2_SDRC_CS0		NV_PA_SDRAM_BASE
 #define LOW_LEVEL_SRAM_STACK	0x4000FFFC