beagleboard: enable HUB power on all variants of the BeagleBoard

Changes made by Jason Kridner with inputs from Eric Benard to special case xM Rev A and xM Rev B

Relevant discussions:
http://www.mail-archive.com/u-boot@lists.denx.de/msg59361.html
http://www.mail-archive.com/u-boot@lists.denx.de/msg59589.html

Signed-off-by: Joel A Fernandes <joelagnel@ti.com>
Cc: Eric Benard <eric@eukrea.com>
Cc: Christian Spielberger <c.spielberger@bct-electronic.com>
Cc: Jason Kridner <jdk@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

board/ti/beagle/beagle.c

@@ -332,7 +332,15 @@ int misc_init_r(void)
 		setenv(expansion_config.env_var, expansion_config.env_setting);
 
 	twl4030_power_init();
-	twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON);
+	switch (get_board_revision()) {
+	case REVISION_XM_A:
+	case REVISION_XM_B:
+		twl4030_led_init(TWL4030_LED_LEDEN_LEDBON);
+		break;
+	default:
+		twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON);
+		break;
+	}
 
 	/* Set GPIO states before they are made outputs */
 	writel(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1,