OMAP3 beagle Add usbtty configuration

The primary console of beagle is the serial header.

A secondary console is to use the usbtty.  The user can set this
manually by doing

setenv stdout usbtty; setenv stdin usbtty; setenv stderr usbtty
saveenv

usbtty will be usable by accessing the /dev/ttyACM0 on a linux host.

Signed-off-by: Tom Rix <Tom.Rix@windriver.com>

include/configs/omap3_beagle.h

@@ -100,6 +100,21 @@
 /* DDR - I use Micron DDR */
 #define CONFIG_OMAP3_MICRON_DDR		1
 
+/* USB */
+#define CONFIG_MUSB_UDC			1
+#define CONFIG_USB_OMAP3		1
+#define CONFIG_TWL4030_USB		1
+
+/* USB device configuration */
+#define CONFIG_USB_DEVICE		1
+#define CONFIG_USB_TTY			1
+#define CONFIG_SYS_CONSOLE_IS_IN_ENV	1
+/* Change these to suit your needs */
+#define CONFIG_USBD_VENDORID		0x0451
+#define CONFIG_USBD_PRODUCTID		0x5678
+#define CONFIG_USBD_MANUFACTURER	"Texas Instruments"
+#define CONFIG_USBD_PRODUCT_NAME	"Beagle"
+
 /* commands to include */
 #include <config_cmd_default.h>
 
@@ -164,6 +179,7 @@
 
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	"loadaddr=0x82000000\0" \
+	"usbtty=cdc_acm\0" \
 	"console=ttyS2,115200n8\0" \
 	"vram=12M\0" \
 	"dvimode=1024x768MR-16@60\0" \