dt-bindings: interrupt-controller: Fix the double quotes

The double quotes seems not ASCII type, fix it here.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Yixun Lan <yixun.lan@amlogic.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

Documentation/devicetree/bindings/interrupt-controller/amlogic,meson-gpio-intc.txt

@@ -9,11 +9,11 @@ number of interrupt exposed depends on the SoC.
 
 Required properties:
 
-- compatible : must have "amlogic,meson8-gpio-intc” and either
-   “amlogic,meson8-gpio-intc” for meson8 SoCs (S802) or
-   “amlogic,meson8b-gpio-intc” for meson8b SoCs (S805) or
-   “amlogic,meson-gxbb-gpio-intc” for GXBB SoCs (S905) or
-   “amlogic,meson-gxl-gpio-intc” for GXL SoCs (S905X, S912)
+- compatible : must have "amlogic,meson8-gpio-intc" and either
+    "amlogic,meson8-gpio-intc" for meson8 SoCs (S802) or
+    "amlogic,meson8b-gpio-intc" for meson8b SoCs (S805) or
+    "amlogic,meson-gxbb-gpio-intc" for GXBB SoCs (S905) or
+    "amlogic,meson-gxl-gpio-intc" for GXL SoCs (S905X, S912)
 - interrupt-parent : a phandle to the GIC the interrupts are routed to.
    Usually this is provided at the root level of the device tree as it is
    common to most of the SoC.