PNP: make generic pnp_add_io_resource()

Add a pnp_add_io_resource() that can be used by all the PNP
backends.  This consolidates a little more pnp_resource_table
knowledge into one place.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/pnp/base.h b/drivers/pnp/base.h
index b6719b3..bfb08ab 100644
--- a/drivers/pnp/base.h
+++ b/drivers/pnp/base.h
@@ -45,3 +45,6 @@
 					  int flags);
 struct pnp_resource *pnp_add_dma_resource(struct pnp_dev *dev, int dma,
 					  int flags);
+struct pnp_resource *pnp_add_io_resource(struct pnp_dev *dev,
+					 resource_size_t start,
+					 resource_size_t end, int flags);