omap3 beagle: led triggers

Assign default roles to two of Beagle's programmable LEDs:

 - usr0 has a heartbeat to show basic activity
 - usr1 shows MMC activity

A third led is controlled by the TWL4030 LED_B signal, but the
TWL driver doesn't yet support leds...
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/board-omap3beagle.c

@@ -139,15 +139,15 @@ static struct omap_lcd_config omap3_beagle_lcd_config __initdata = {
 	.ctrl_name	= "internal",
 };
 
-struct gpio_led gpio_leds[] = {
+static struct gpio_led gpio_leds[] = {
 	{
 		.name			= "beagleboard::usr0",
-		.default_trigger	= "none",
+		.default_trigger	= "heartbeat",
 		.gpio			= 150,
 	},
 	{
 		.name			= "beagleboard::usr1",
-		.default_trigger	= "none",
+		.default_trigger	= "mmc0",
 		.gpio			= 149,
 	},
 };