bmips: switch to upstream ehci overcurrent flag

After backporting upstream ehci overcurrent patches we need to use spurious-oc
instead of ignore-oc.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

target/linux/bmips/dts/bcm6318.dtsi

@@ -304,7 +304,7 @@
 			compatible = "brcm,bcm6318-ehci", "generic-ehci";
 			reg = <0x10005000 0x100>;
 			big-endian;
-			ignore-oc;
+			spurious-oc;
 
 			interrupt-parent = <&periph_intc>;
 			interrupts = <BCM6318_IRQ_EHCI>;

target/linux/bmips/dts/bcm63268.dtsi

@@ -396,7 +396,7 @@
 			compatible = "brcm,bcm63268-ehci", "generic-ehci";
 			reg = <0x10002500 0x100>;
 			big-endian;
-			ignore-oc;
+			spurious-oc;
 
 			interrupt-parent = <&periph_intc>;
 			interrupts = <BCM63268_IRQ_EHCI>;

target/linux/bmips/dts/bcm6328.dtsi

@@ -334,7 +334,7 @@
 			compatible = "brcm,bcm6328-ehci", "generic-ehci";
 			reg = <0x10002500 0x100>;
 			big-endian;
-			ignore-oc;
+			spurious-oc;
 
 			interrupt-parent = <&periph_intc>;
 			interrupts = <BCM6328_IRQ_EHCI>;

target/linux/bmips/dts/bcm6358.dtsi

@@ -309,7 +309,7 @@
 			compatible = "brcm,bcm6358-ehci", "generic-ehci";
 			reg = <0xfffe1300 0x100>;
 			big-endian;
-			ignore-oc;
+			spurious-oc;
 
 			interrupt-parent = <&periph_intc>;
 			interrupts = <BCM6358_IRQ_EHCI>;

target/linux/bmips/dts/bcm6362.dtsi

@@ -431,7 +431,7 @@
 			compatible = "brcm,bcm6362-ehci", "generic-ehci";
 			reg = <0x10002500 0x100>;
 			big-endian;
-			ignore-oc;
+			spurious-oc;
 
 			interrupt-parent = <&periph_intc>;
 			interrupts = <BCM6362_IRQ_EHCI>;

target/linux/bmips/dts/bcm6368.dtsi

@@ -446,7 +446,7 @@
 			compatible = "brcm,bcm6368-ehci", "generic-ehci";
 			reg = <0x10001500 0x100>;
 			big-endian;
-			ignore-oc;
+			spurious-oc;
 
 			interrupt-parent = <&periph_intc>;
 			interrupts = <BCM6368_IRQ_EHCI>;