ARM: dts: exynos: Remove DMA controller bus node name to fix dtschema warnings

There is no need to keep DMA controller nodes under AMBA bus node.
Remove the "amba" node to fix dtschema warnings like:

    amba: $nodename:0: 'amba' does not match '^(bus|soc|axi|ahb|apb)(@[0-9a-f]+)?$'
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>

arch/arm/boot/dts/exynos3250.dtsi

@@ -418,12 +418,6 @@ exynos_usbphy: exynos-usbphy@125b0000 {
 			status = "disabled";
 		};
 
-		amba {
-			compatible = "simple-bus";
-			#address-cells = <1>;
-			#size-cells = <1>;
-			ranges;
-
 		pdma0: pdma@12680000 {
 			compatible = "arm,pl330", "arm,primecell";
 			reg = <0x12680000 0x1000>;
@@ -445,7 +439,6 @@ pdma1: pdma@12690000 {
 			#dma-channels = <8>;
 			#dma-requests = <32>;
 		};
-		};
 
 		adc: adc@126c0000 {
 			compatible = "samsung,exynos3250-adc";

arch/arm/boot/dts/exynos4.dtsi

@@ -669,13 +669,6 @@ pwm: pwm@139d0000 {
 			status = "disabled";
 		};
 
-		amba: amba {
-			#address-cells = <1>;
-			#size-cells = <1>;
-			compatible = "simple-bus";
-			interrupt-parent = <&gic>;
-			ranges;
-
 		pdma0: pdma@12680000 {
 			compatible = "arm,pl330", "arm,primecell";
 			reg = <0x12680000 0x1000>;
@@ -708,7 +701,6 @@ mdma1: mdma@12850000 {
 			#dma-channels = <8>;
 			#dma-requests = <1>;
 		};
-		};
 
 		fimd: fimd@11c00000 {
 			compatible = "samsung,exynos4210-fimd";

arch/arm/boot/dts/exynos4210-universal_c210.dts

@@ -181,20 +181,6 @@ hdmi_ddc: i2c-ddc {
 	};
 };
 
-&amba {
-	mdma0: mdma@12840000 {
-		compatible = "arm,pl330", "arm,primecell";
-		reg = <0x12840000 0x1000>;
-		interrupts = <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&clock CLK_MDMA>;
-		clock-names = "apb_pclk";
-		#dma-cells = <1>;
-		#dma-channels = <8>;
-		#dma-requests = <1>;
-		power-domains = <&pd_lcd0>;
-	};
-};
-
 &camera {
 	status = "okay";
 
@@ -616,6 +602,20 @@ &serial_3 {
 	/delete-property/dma-names;
 };
 
+&soc {
+	mdma0: mdma@12840000 {
+		compatible = "arm,pl330", "arm,primecell";
+		reg = <0x12840000 0x1000>;
+		interrupts = <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clock CLK_MDMA>;
+		clock-names = "apb_pclk";
+		#dma-cells = <1>;
+		#dma-channels = <8>;
+		#dma-requests = <1>;
+		power-domains = <&pd_lcd0>;
+	};
+};
+
 &sysram {
 	smp-sram@0 {
 		status = "disabled";

arch/arm/boot/dts/exynos5250.dtsi

@@ -679,13 +679,6 @@ usb2_phy_gen: phy@12130000 {
 			samsung,pmureg-phandle = <&pmu_system_controller>;
 		};
 
-		amba {
-			#address-cells = <1>;
-			#size-cells = <1>;
-			compatible = "simple-bus";
-			interrupt-parent = <&gic>;
-			ranges;
-
 		pdma0: pdma@121a0000 {
 			compatible = "arm,pl330", "arm,primecell";
 			reg = <0x121A0000 0x1000>;
@@ -729,7 +722,6 @@ mdma1: mdma@11c10000 {
 			#dma-channels = <8>;
 			#dma-requests = <1>;
 		};
-		};
 
 		gsc_0:  gsc@13e00000 {
 			compatible = "samsung,exynos5250-gsc", "samsung,exynos5-gsc";

arch/arm/boot/dts/exynos5410.dtsi

@@ -189,13 +189,6 @@ pinctrl_3: pinctrl@3860000 {
 			interrupts = <GIC_SPI 47 IRQ_TYPE_LEVEL_HIGH>;
 		};
 
-		amba {
-			#address-cells = <1>;
-			#size-cells = <1>;
-			compatible = "simple-bus";
-			interrupt-parent = <&gic>;
-			ranges;
-
 		pdma0: pdma@121a0000 {
 			compatible = "arm,pl330", "arm,primecell";
 			reg = <0x121a0000 0x1000>;
@@ -217,7 +210,6 @@ pdma1: pdma@121b0000 {
 			#dma-channels = <8>;
 			#dma-requests = <32>;
 		};
-		};
 
 		audi2s0: i2s@3830000 {
 			compatible = "samsung,exynos5420-i2s";

arch/arm/boot/dts/exynos5420.dtsi

@@ -433,13 +433,6 @@ pinctrl_4: pinctrl@3860000 {
 			power-domains = <&mau_pd>;
 		};
 
-		amba {
-			#address-cells = <1>;
-			#size-cells = <1>;
-			compatible = "simple-bus";
-			interrupt-parent = <&gic>;
-			ranges;
-
 		adma: adma@3880000 {
 			compatible = "arm,pl330", "arm,primecell";
 			reg = <0x03880000 0x1000>;
@@ -503,7 +496,6 @@ mdma1: mdma@11c10000 {
 			 */
 			status = "disabled";
 		};
-		};
 
 		i2s0: i2s@3830000 {
 			compatible = "samsung,exynos5420-i2s";