[MIPS] Eleminate interrupt migration helper use.

> #define hw_interrupt_type       irq_chip
> typedef struct irq_chip         hw_irq_controller;
> #define no_irq_type             no_irq_chip
> typedef struct irq_desc         irq_desc_t;

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/jmr3927/rbhma3100/irq.c b/arch/mips/jmr3927/rbhma3100/irq.c
index 9c43702..7221744 100644
--- a/arch/mips/jmr3927/rbhma3100/irq.c
+++ b/arch/mips/jmr3927/rbhma3100/irq.c
@@ -416,7 +416,7 @@
 	set_c0_status(ST0_IM);	/* IE bit is still 0. */
 }
 
-static hw_irq_controller jmr3927_irq_controller = {
+static struct irq_chip jmr3927_irq_controller = {
 	.typename = "jmr3927_irq",
 	.startup = jmr3927_irq_startup,
 	.shutdown = jmr3927_irq_shutdown,