riscv: dts: microchip: add mpfs's CAN controllers

PolarFire SoC has a pair of CAN controllers, but as they were
undocumented there were omitted from the device tree. Add them.

Link: https://lore.kernel.org/all/20220607065459.2035746-3-conor.dooley@microchip.comSigned-off-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

arch/riscv/boot/dts/microchip/mpfs.dtsi

@@ -330,6 +330,24 @@ i2c1: i2c@2010b000 {
 			status = "disabled";
 		};
 
+		can0: can@2010c000 {
+			compatible = "microchip,mpfs-can";
+			reg = <0x0 0x2010c000 0x0 0x1000>;
+			clocks = <&clkcfg CLK_CAN0>;
+			interrupt-parent = <&plic>;
+			interrupts = <56>;
+			status = "disabled";
+		};
+
+		can1: can@2010d000 {
+			compatible = "microchip,mpfs-can";
+			reg = <0x0 0x2010d000 0x0 0x1000>;
+			clocks = <&clkcfg CLK_CAN1>;
+			interrupt-parent = <&plic>;
+			interrupts = <57>;
+			status = "disabled";
+		};
+
 		mac0: ethernet@20110000 {
 			compatible = "cdns,macb";
 			reg = <0x0 0x20110000 0x0 0x2000>;