[POWERPC] Uninline and export virq_to_hw() for the pasemi_mac driver

Uninline virq_to_hw and export it so modules can use it. The alternative
would be to export the irq_map array instead, but it's an infrequently
called function, and keeping the array unexported seems considerably
cleaner.

This is needed so that the pasemi_mac driver can be compiled as a module.
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/kernel/irq.c

@@ -412,6 +412,12 @@ struct irq_map_entry irq_map[NR_IRQS];
 static unsigned int irq_virq_count = NR_IRQS;
 static struct irq_host *irq_default_host;
 
+irq_hw_number_t virq_to_hw(unsigned int virq)
+{
+	return irq_map[virq].hwirq;
+}
+EXPORT_SYMBOL_GPL(virq_to_hw);
+
 struct irq_host *irq_alloc_host(unsigned int revmap_type,
 				unsigned int revmap_arg,
 				struct irq_host_ops *ops,

include/asm-powerpc/irq.h

@@ -138,10 +138,7 @@ struct irq_map_entry {
 
 extern struct irq_map_entry irq_map[NR_IRQS];
 
-static inline irq_hw_number_t virq_to_hw(unsigned int virq)
-{
-	return irq_map[virq].hwirq;
-}
+extern irq_hw_number_t virq_to_hw(unsigned int virq);
 
 /**
  * irq_alloc_host - Allocate a new irq_host data structure