arm64: dts: rockchip: Add FRAM MB85RS128TY to rk3568-mecsbc

The board features a Fujitsu MB85RS128TY FRAM chip connected to spi0 CS
0. Add support for the MB85RS128TY to the device tree.

Signed-off-by: David Jander <[email protected]>
Signed-off-by: Jonas Rebmann <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Heiko Stuebner <[email protected]>

Author: yope

arch/arm64/boot/dts/rockchip/rk3568-mecsbc.dts

@@ -351,6 +351,19 @@
 	status = "okay";
 };
 
+&spi0 {
+	/* use hardware chipselect on cs0 (cs1 unconnected) */
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi0m0_pins>, <&spi0m0_cs0>;
+	status = "okay";
+
+	fram@0 {
+		compatible = "fujitsu,mb85rs128ty";
+		reg = <0>;
+		spi-max-frequency = <33000000>;
+	};
+};
+
 &tsadc {
 	rockchip,hw-tshut-mode = <1>;
 	rockchip,hw-tshut-polarity = <0>;