add expansion

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

mk_mmc.sh

@@ -544,14 +544,14 @@ function boot_uenv_txt_template {
 	cat >> ${TEMPDIR}/bootscripts/normal.cmd <<-__EOF__
 		video_args=setenv video VIDEO_DISPLAY
 		device_args=run video_args; run expansion_args; run mmcargs
-		mmcargs=setenv bootargs console=\${console} \${optargs} \${video} root=\${mmcroot} rootfstype=\${mmcrootfstype} \${device_args}
+		mmcargs=setenv bootargs console=\${console} \${optargs} \${video} root=\${mmcroot} rootfstype=\${mmcrootfstype} \${device_args} \${expansion}
 
 	__EOF__
 
 	cat >> ${TEMPDIR}/bootscripts/netinstall.cmd <<-__EOF__
 		video_args=setenv video VIDEO_DISPLAY
 		device_args=run video_args; run expansion_args; run mmcargs
-		mmcargs=setenv bootargs console=\${console} \${optargs} \${video} root=\${mmcroot} \${device_args}
+		mmcargs=setenv bootargs console=\${console} \${optargs} \${video} root=\${mmcroot} \${device_args} \${expansion}
 
 	__EOF__