[ARM] Rename chipdata to 'base' and make it an iomem pointer

In all current use cases, "chipdata" is used to store an iomem address.
Mark it with __iomem, and rename it to 'base'.  Leave the accessor macros
alone.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/include/asm-arm/mach/irq.h b/include/asm-arm/mach/irq.h
index 0ce6ca5..76d0524 100644
--- a/include/asm-arm/mach/irq.h
+++ b/include/asm-arm/mach/irq.h
@@ -61,7 +61,7 @@
 	struct irqchip	*chip;
 	struct irqaction *action;
 	struct list_head pend;
-	void		*chipdata;
+	void __iomem	*base;
 	void		*data;
 	unsigned int	disable_depth;
 
@@ -113,8 +113,8 @@
 #define set_irq_handler(irq,handler)		__set_irq_handler(irq,handler,0)
 #define set_irq_chained_handler(irq,handler)	__set_irq_handler(irq,handler,1)
 #define set_irq_data(irq,d)			do { irq_desc[irq].data = d; } while (0)
-#define set_irq_chipdata(irq,d)			do { irq_desc[irq].chipdata = d; } while (0)
-#define get_irq_chipdata(irq)			(irq_desc[irq].chipdata)
+#define set_irq_chipdata(irq,d)			do { irq_desc[irq].base = d; } while (0)
+#define get_irq_chipdata(irq)			(irq_desc[irq].base)
 
 void set_irq_chip(unsigned int irq, struct irqchip *);
 void set_irq_flags(unsigned int irq, unsigned int flags);