irqchip: clps711x: Changing the compatibility string to match with the smallest supported chip

This patch changes the compatibility string to match with the smallest
supported chip (EP7209). Since the DT-support for this CPU is not yet
announced, this change is safe.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Documentation/devicetree/bindings/interrupt-controller/cirrus,clps711x-intc.txt

@@ -2,7 +2,7 @@ Cirrus Logic CLPS711X Interrupt Controller
 
 Required properties:
 
-- compatible: Should be "cirrus,clps711x-intc".
+- compatible: Should be "cirrus,ep7209-intc".
 - reg: Specifies base physical address of the registers set.
 - interrupt-controller: Identifies the node as an interrupt controller.
 - #interrupt-cells: Specifies the number of cells needed to encode an
@@ -34,7 +34,7 @@ ID	Name	Description
 
 Example:
 	intc: interrupt-controller {
-		compatible = "cirrus,clps711x-intc";
+		compatible = "cirrus,ep7312-intc", "cirrus,ep7209-intc";
 		reg = <0x80000000 0x4000>;
 		interrupt-controller;
 		#interrupt-cells = <1>;

drivers/irqchip/irq-clps711x.c

@@ -234,5 +234,5 @@ static int __init clps711x_intc_init_dt(struct device_node *np,
 
 	return _clps711x_intc_init(np, res.start, resource_size(&res));
 }
-IRQCHIP_DECLARE(clps711x, "cirrus,clps711x-intc", clps711x_intc_init_dt);
+IRQCHIP_DECLARE(clps711x, "cirrus,ep7209-intc", clps711x_intc_init_dt);
 #endif