arm64: dts: rockchip: Add some pins for NanoPi4

The NanoPi4 boards have the RK808's always-on 32KHz clock wired to the
SoC, so have it claim the relevant pinctrl to actually enable the
CLK32K_IN input. The RK808's SLEEP pin is also wired to the SoC's
AP_PWROFF output, so we may as well claim that too.
Signed-off-by: NRobin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/e870284a872567f163868b77267c01b77ed6f22a.1647381986.git.robin.murphy@arm.comSigned-off-by: NHeiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi

@@ -267,7 +267,7 @@
 		interrupt-parent = <&gpio1>;
 		interrupts = <21 IRQ_TYPE_LEVEL_LOW>;
 		pinctrl-names = "default";
-		pinctrl-0 = <&pmic_int_l>;
+		pinctrl-0 = <&pmic_int_l>, <&ap_pwroff>, <&clk_32k>;
 		rockchip,system-power-controller;
 		wakeup-source;