powerpc: Wire up /proc/vmallocinfo to our ioremap()

This adds the necessary bits and pieces to powerpc implementation of
ioremap to benefit from caller tracking in /proc/vmallocinfo, at least
for ioremap's done after mem init as the older ones aren't tracked.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h
index 6c34a0d..0efdb1d 100644
--- a/arch/powerpc/include/asm/machdep.h
+++ b/arch/powerpc/include/asm/machdep.h
@@ -90,7 +90,7 @@
 	void		(*tce_flush)(struct iommu_table *tbl);
 
 	void __iomem *	(*ioremap)(phys_addr_t addr, unsigned long size,
-				   unsigned long flags);
+				   unsigned long flags, void *caller);
 	void		(*iounmap)(volatile void __iomem *token);
 
 #ifdef CONFIG_PM