[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>

arch/mips/jazz/irq.c

@@ -55,7 +55,7 @@ static void end_r4030_irq(unsigned int irq)
 		enable_r4030_irq(irq);
 }
 
-static struct hw_interrupt_type r4030_irq_type = {
+static struct irq_chip r4030_irq_type = {
 	.typename = "R4030",
 	.startup = startup_r4030_irq,
 	.shutdown = shutdown_r4030_irq,