ARM: dts: rockchip: enable tsadc for rk3229-evb

This patch enables the tsadc for rk3229-evb board.

The rk3229 evb board uses the CRU to reset the chip since it has not
the PMIC to connect it, and TSHUT is low active on evb board.
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3229-evb.dts

@@ -204,6 +204,11 @@ &pwm2 {
 	status = "okay";
 };
 
+&tsadc {
+	rockchip,hw-tshut-mode = <0>; /* tshut mode 0:CRU 1:GPIO */
+	status = "okay";
+};
+
 &uart2 {
 	status = "okay";
 };