led: added cmd_led to Makefile

Addition of cmd_led into the Makefile wasn't included in the patch
applied to u-boot-ti.

Signed-off-by: Jason Kridner <jkridner@beagleboard.org>
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
Signed-off-by: Joel A Fernandes <agnel.joel@gmail.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

common/Makefile

@@ -106,6 +106,7 @@ COBJS-$(CONFIG_CMD_ITEST) += cmd_itest.o
 COBJS-$(CONFIG_CMD_JFFS2) += cmd_jffs2.o
 COBJS-$(CONFIG_CMD_CRAMFS) += cmd_cramfs.o
 COBJS-$(CONFIG_CMD_LDRINFO) += cmd_ldrinfo.o
+COBJS-$(CONFIG_CMD_LED) += cmd_led.o
 COBJS-$(CONFIG_CMD_LICENSE) += cmd_license.o
 COBJS-y += cmd_load.o
 COBJS-$(CONFIG_LOGBUFFER) += cmd_log.o