project: msm8909: enable runtime append of bootdevice in commandline.

Change to enable runtime append of bootdevice in commandline

Change-Id: If3b900da41be17cbb258a10478c77976411d9a6a
diff --git a/project/msm8909.mk b/project/msm8909.mk
index 0d820e6..f7525f9 100644
--- a/project/msm8909.mk
+++ b/project/msm8909.mk
@@ -28,6 +28,7 @@
 ENABLE_PWM_SUPPORT := true
 ENABLE_BOOT_CONFIG_SUPPORT := 1
 
+DEFINES += USE_BOOTDEV_CMDLINE=1
 #DEFINES += WITH_DEBUG_DCC=1
 DEFINES += WITH_DEBUG_LOG_BUF=1
 DEFINES += WITH_DEBUG_UART=1