ARM: dts: imx25-karo-tx25: Put status entry in the end

Just to keep consistency with other dts files, place 'status' entry as the last
one.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>