[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/sgi-ip32/ip32-irq.c b/arch/mips/sgi-ip32/ip32-irq.c
index 3b7e74b..ac658c4 100644
--- a/arch/mips/sgi-ip32/ip32-irq.c
+++ b/arch/mips/sgi-ip32/ip32-irq.c
@@ -160,7 +160,7 @@
 #define shutdown_cpu_irq disable_cpu_irq
 #define mask_and_ack_cpu_irq disable_cpu_irq
 
-static struct hw_interrupt_type ip32_cpu_interrupt = {
+static struct irq_chip ip32_cpu_interrupt = {
 	.typename = "IP32 CPU",
 	.startup = startup_cpu_irq,
 	.shutdown = shutdown_cpu_irq,
@@ -230,7 +230,7 @@
 
 #define shutdown_crime_irq disable_crime_irq
 
-static struct hw_interrupt_type ip32_crime_interrupt = {
+static struct irq_chip ip32_crime_interrupt = {
 	.typename = "IP32 CRIME",
 	.startup = startup_crime_irq,
 	.shutdown = shutdown_crime_irq,
@@ -289,7 +289,7 @@
 #define shutdown_macepci_irq disable_macepci_irq
 #define mask_and_ack_macepci_irq disable_macepci_irq
 
-static struct hw_interrupt_type ip32_macepci_interrupt = {
+static struct irq_chip ip32_macepci_interrupt = {
 	.typename = "IP32 MACE PCI",
 	.startup = startup_macepci_irq,
 	.shutdown = shutdown_macepci_irq,
@@ -419,7 +419,7 @@
 
 #define shutdown_maceisa_irq disable_maceisa_irq
 
-static struct hw_interrupt_type ip32_maceisa_interrupt = {
+static struct irq_chip ip32_maceisa_interrupt = {
 	.typename = "IP32 MACE ISA",
 	.startup = startup_maceisa_irq,
 	.shutdown = shutdown_maceisa_irq,
@@ -469,7 +469,7 @@
 #define shutdown_mace_irq disable_mace_irq
 #define mask_and_ack_mace_irq disable_mace_irq
 
-static struct hw_interrupt_type ip32_mace_interrupt = {
+static struct irq_chip ip32_mace_interrupt = {
 	.typename = "IP32 MACE",
 	.startup = startup_mace_irq,
 	.shutdown = shutdown_mace_irq,
@@ -575,7 +575,7 @@
 	mace->perif.ctrl.imask = 0;
 
 	for (irq = 0; irq <= IP32_IRQ_MAX; irq++) {
-		hw_irq_controller *controller;
+		struct irq_chip *controller;
 
 		if (irq == IP32_R4K_TIMER_IRQ)
 			controller = &ip32_cpu_interrupt;