BeagleBoard: Added LED driver

Added LED driver using status_led.  USR0 is set to monitor the boot
status.  USR1 is set to be the green LED.

Included adding configuration and command to the default configuration.

Signed-off-by: Jason Kridner <jkridner@beagleboard.org>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
diff --git a/board/ti/beagle/Makefile b/board/ti/beagle/Makefile
index 3b4aaac..d9f445f 100644
--- a/board/ti/beagle/Makefile
+++ b/board/ti/beagle/Makefile
@@ -25,8 +25,10 @@
 
 LIB	= $(obj)lib$(BOARD).o
 
-COBJS	:= beagle.o
+COBJS-y	:= $(BOARD).o
+COBJS-$(CONFIG_STATUS_LED) += led.o
 
+COBJS	:= $(sort $(COBJS-y))
 SRCS	:= $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))