riscv: ae350: Clean up mixed tabs and spaces in the dts

There are quite a lot of mixed tabs and spaces in the ae350.dts.
Clean them up.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>

arch/riscv/dts/ae350.dts

@@ -20,6 +20,7 @@
 		#address-cells = <1>;
 		#size-cells = <0>;
 		timebase-frequency = <10000000>;
+
 		CPU0: cpu@0 {
 			device_type = "cpu";
 			reg = <0>;
@@ -28,6 +29,7 @@
 			riscv,isa = "rv64imafdc";
 			mmu-type = "riscv,sv39";
 			clock-frequency = <60000000>;
+
 			CPU0_intc: interrupt-controller {
 				#interrupt-cells = <1>;
 				interrupt-controller;
@@ -138,6 +140,7 @@
 		clocks = <&spiclk>;
 		interrupts = <3 4>;
 		interrupt-parent = <&plic0>;
+
 		flash@0 {
 			compatible = "spi-flash";
 			spi-max-frequency = <50000000>;