powerpc: Make "intspec" pointers in irq_host->xlate() const

Writing a driver using SCLPC on the MPC5200B I detected, that the
intspec arrays to map irqs to Linux virq cannot be const, because the
mapping and xlate functions only take non const pointers. All those
functions do not modify the intspec, so a const pointer could be used.

Signed-off-by: Roman Fietze <roman.fietze@telemotive.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/sysdev/cpm2_pic.c

@@ -218,7 +218,7 @@ static int cpm2_pic_host_map(struct irq_host *h, unsigned int virq,
 }
 
 static int cpm2_pic_host_xlate(struct irq_host *h, struct device_node *ct,
-			    u32 *intspec, unsigned int intsize,
+			    const u32 *intspec, unsigned int intsize,
 			    irq_hw_number_t *out_hwirq, unsigned int *out_flags)
 {
 	*out_hwirq = intspec[0];

arch/powerpc/sysdev/i8259.c

@@ -198,7 +198,7 @@ static void i8259_host_unmap(struct irq_host *h, unsigned int virq)
 }
 
 static int i8259_host_xlate(struct irq_host *h, struct device_node *ct,
-			    u32 *intspec, unsigned int intsize,
+			    const u32 *intspec, unsigned int intsize,
 			    irq_hw_number_t *out_hwirq, unsigned int *out_flags)
 {
 	static unsigned char map_isa_senses[4] = {

arch/powerpc/sysdev/ipic.c

@@ -697,7 +697,7 @@ static int ipic_host_map(struct irq_host *h, unsigned int virq,
 }
 
 static int ipic_host_xlate(struct irq_host *h, struct device_node *ct,
-			   u32 *intspec, unsigned int intsize,
+			   const u32 *intspec, unsigned int intsize,
 			   irq_hw_number_t *out_hwirq, unsigned int *out_flags)
 
 {

arch/powerpc/sysdev/mpc8xx_pic.c

@@ -130,7 +130,7 @@ static int mpc8xx_pic_host_map(struct irq_host *h, unsigned int virq,
 
 
 static int mpc8xx_pic_host_xlate(struct irq_host *h, struct device_node *ct,
-			    u32 *intspec, unsigned int intsize,
+			    const u32 *intspec, unsigned int intsize,
 			    irq_hw_number_t *out_hwirq, unsigned int *out_flags)
 {
 	static unsigned char map_pic_senses[4] = {

arch/powerpc/sysdev/mpic.c

@@ -994,7 +994,7 @@ static int mpic_host_map(struct irq_host *h, unsigned int virq,
 }
 
 static int mpic_host_xlate(struct irq_host *h, struct device_node *ct,
-			   u32 *intspec, unsigned int intsize,
+			   const u32 *intspec, unsigned int intsize,
 			   irq_hw_number_t *out_hwirq, unsigned int *out_flags)
 
 {

arch/powerpc/sysdev/qe_lib/qe_ic.c

@@ -271,7 +271,7 @@ static int qe_ic_host_map(struct irq_host *h, unsigned int virq,
 }
 
 static int qe_ic_host_xlate(struct irq_host *h, struct device_node *ct,
-			    u32 * intspec, unsigned int intsize,
+			    const u32 * intspec, unsigned int intsize,
 			    irq_hw_number_t * out_hwirq,
 			    unsigned int *out_flags)
 {

arch/powerpc/sysdev/tsi108_pci.c

@@ -384,7 +384,7 @@ static struct irq_chip tsi108_pci_irq = {
 };
 
 static int pci_irq_host_xlate(struct irq_host *h, struct device_node *ct,
-			    u32 *intspec, unsigned int intsize,
+			    const u32 *intspec, unsigned int intsize,
 			    irq_hw_number_t *out_hwirq, unsigned int *out_flags)
 {
 	*out_hwirq = intspec[0];

arch/powerpc/sysdev/uic.c

@@ -202,7 +202,7 @@ static int uic_host_map(struct irq_host *h, unsigned int virq,
 }
 
 static int uic_host_xlate(struct irq_host *h, struct device_node *ct,
-			  u32 *intspec, unsigned int intsize,
+			  const u32 *intspec, unsigned int intsize,
 			  irq_hw_number_t *out_hwirq, unsigned int *out_type)
 
 {

arch/powerpc/sysdev/xilinx_intc.c

@@ -148,7 +148,7 @@ static struct irq_chip xilinx_intc_edge_irqchip = {
  * xilinx_intc_xlate - translate virq# from device tree interrupts property
  */
 static int xilinx_intc_xlate(struct irq_host *h, struct device_node *ct,
-				u32 *intspec, unsigned int intsize,
+				const u32 *intspec, unsigned int intsize,
 				irq_hw_number_t *out_hwirq,
 				unsigned int *out_flags)
 {