riscv: dts: sifive: drop duplicated nodes and properties in sifive

The DTSI file defines soc node and address/size cells, so there is no
point in duplicating it in DTS file.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Tested-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Link: https://lore.kernel.org/r/20210920130248.145058-3-krzysztof.kozlowski@canonical.com

arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts

@@ -8,8 +8,6 @@
 #define RTCCLK_FREQ		1000000
 
 / {
-	#address-cells = <2>;
-	#size-cells = <2>;
 	model = "SiFive HiFive Unleashed A00";
 	compatible = "sifive,hifive-unleashed-a00", "sifive,fu540-c000",
 		     "sifive,fu540";
@@ -27,9 +25,6 @@ memory@80000000 {
 		reg = <0x0 0x80000000 0x2 0x00000000>;
 	};
 
-	soc {
-	};
-
 	hfclk: hfclk {
 		#clock-cells = <0>;
 		compatible = "fixed-clock";

arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts

@@ -8,8 +8,6 @@
 #define RTCCLK_FREQ		1000000
 
 / {
-	#address-cells = <2>;
-	#size-cells = <2>;
 	model = "SiFive HiFive Unmatched A00";
 	compatible = "sifive,hifive-unmatched-a00", "sifive,fu740-c000",
 		     "sifive,fu740";
@@ -27,9 +25,6 @@ memory@80000000 {
 		reg = <0x0 0x80000000 0x4 0x00000000>;
 	};
 
-	soc {
-	};
-
 	hfclk: hfclk {
 		#clock-cells = <0>;
 		compatible = "fixed-clock";