device-fsl

MA-13112 add back ro.sf.lcd_density on mek_8q init.rc

This property is missed in MA-13062 selinux: enable
compatiable property config.

Change-Id: I9b4bf669d7a0c1ec5b5fc51120333a6dd66126f0
Signed-off-by: Jindong <jindong.yue@nxp.com>
Reviewed-on: http://androidsource.ap.freescale.net/project/6245
Reviewed-by: juan.hao <juan.hao@nxp.com>