MIPS: JZ4740: probe CPU interrupt controller via DT

Use the generic irqchip_init function to probe irqchip drivers using DT,
and add the appropriate node to the JZ4740 devicetree in place of the
call to mips_cpu_irq_init.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Patchwork: https://patchwork.linux-mips.org/patch/10166/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/boot/dts/ingenic/jz4740.dtsi

@@ -2,4 +2,11 @@
 	#address-cells = <1>;
 	#size-cells = <1>;
 	compatible = "ingenic,jz4740";
+
+	cpuintc: interrupt-controller@0 {
+		#address-cells = <0>;
+		#interrupt-cells = <1>;
+		interrupt-controller;
+		compatible = "mti,cpu-interrupt-controller";
+	};
 };

arch/mips/jz4740/irq.c

@@ -18,6 +18,7 @@
 #include <linux/types.h>
 #include <linux/interrupt.h>
 #include <linux/ioport.h>
+#include <linux/irqchip.h>
 #include <linux/timex.h>
 #include <linux/slab.h>
 #include <linux/delay.h>
@@ -27,7 +28,6 @@
 
 #include <asm/io.h>
 #include <asm/mipsregs.h>
-#include <asm/irq_cpu.h>
 
 #include <asm/mach-jz4740/base.h>
 #include <asm/mach-jz4740/irq.h>
@@ -84,7 +84,7 @@ void __init arch_init_irq(void)
 	struct irq_chip_generic *gc;
 	struct irq_chip_type *ct;
 
-	mips_cpu_irq_init();
+	irqchip_init();
 
 	jz_intc_base = ioremap(JZ4740_INTC_BASE_ADDR, 0x14);