IRQCHIP: irq_cpu: declare irqchip table entry

Allow the MIPS CPU interrupt controller to be probed from DT using the
generic __irqchip_of_table for platforms which use irqchip_init. This
will avoid such platforms needing to duplicate the compatible string &
init function pointer.

[ralf@linux-mips.org: Resolved conflict due the preceeding commit that
moves irq-cpu.c.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: linux-mips@linux-mips.org
Cc: Qais Yousef <qais.yousef@imgtec.com>
Cc: Andrew Bresticker <abrestic@chromium.org>
Cc: linux-kernel@vger.kernel.org
Cc: Felix Fietkau <nbd@openwrt.org>
Patchwork: https://patchwork.linux-mips.org/patch/10131/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

drivers/irqchip/irq-mips-cpu.c

@@ -38,6 +38,8 @@
 #include <asm/mipsmtregs.h>
 #include <asm/setup.h>
 
+#include "irqchip.h"
+
 static inline void unmask_mips_irq(struct irq_data *d)
 {
 	set_c0_status(0x100 << (d->irq - MIPS_CPU_IRQ_BASE));
@@ -167,3 +169,4 @@ int __init mips_cpu_irq_of_init(struct device_node *of_node,
 	__mips_cpu_irq_init(of_node);
 	return 0;
 }
+IRQCHIP_DECLARE(cpu_intc, "mti,cpu-interrupt-controller", mips_cpu_irq_of_init);