arm64: tegra: Remove useless usb-ehci compatible string

There's no such thing as a generic USB EHCI controller. The EHCI
controllers found on Tegra SoCs are instantiations that need Tegra-
specific glue to work properly, so drop the generic compatible string
and keep only the Tegra-specific ones.
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm64/boot/dts/nvidia/tegra132.dtsi

@@ -1107,7 +1107,7 @@ tegra_i2s4: i2s@70301400 {
 	};
 
 	usb@7d000000 {
-		compatible = "nvidia,tegra124-ehci", "nvidia,tegra30-ehci", "usb-ehci";
+		compatible = "nvidia,tegra124-ehci", "nvidia,tegra30-ehci";
 		reg = <0x0 0x7d000000 0x0 0x4000>;
 		interrupts = <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>;
 		phy_type = "utmi";
@@ -1148,7 +1148,7 @@ phy1: usb-phy@7d000000 {
 	};
 
 	usb@7d004000 {
-		compatible = "nvidia,tegra124-ehci", "nvidia,tegra30-ehci", "usb-ehci";
+		compatible = "nvidia,tegra124-ehci", "nvidia,tegra30-ehci";
 		reg = <0x0 0x7d004000 0x0 0x4000>;
 		interrupts = <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>;
 		phy_type = "utmi";
@@ -1188,7 +1188,7 @@ phy2: usb-phy@7d004000 {
 	};
 
 	usb@7d008000 {
-		compatible = "nvidia,tegra124-ehci", "nvidia,tegra30-ehci", "usb-ehci";
+		compatible = "nvidia,tegra124-ehci", "nvidia,tegra30-ehci";
 		reg = <0x0 0x7d008000 0x0 0x4000>;
 		interrupts = <GIC_SPI 97 IRQ_TYPE_LEVEL_HIGH>;
 		phy_type = "utmi";

arch/arm64/boot/dts/nvidia/tegra210.dtsi

@@ -1820,7 +1820,7 @@ spi@70410000 {
 	};
 
 	usb@7d000000 {
-		compatible = "nvidia,tegra210-ehci", "nvidia,tegra30-ehci", "usb-ehci";
+		compatible = "nvidia,tegra210-ehci", "nvidia,tegra30-ehci";
 		reg = <0x0 0x7d000000 0x0 0x4000>;
 		interrupts = <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>;
 		phy_type = "utmi";
@@ -1858,7 +1858,7 @@ phy1: usb-phy@7d000000 {
 	};
 
 	usb@7d004000 {
-		compatible = "nvidia,tegra210-ehci", "nvidia,tegra30-ehci", "usb-ehci";
+		compatible = "nvidia,tegra210-ehci", "nvidia,tegra30-ehci";
 		reg = <0x0 0x7d004000 0x0 0x4000>;
 		interrupts = <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>;
 		phy_type = "utmi";