ata: libahci: Silence compiler warning on 64-bit

Commit 725c7b57 (ata: libahci_platform: move port_map parameters
into the AHCI structure) moves flags into the struct ahci_host_priv's
.flags field, which causes compiler warnings on 64-bit builds when that
value is cast to a void * pointer. Cast to an unsigned long so that the
subsequent cast to a pointer doesn't produce a warning.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

drivers/ata/libahci_platform.c

@@ -426,7 +426,7 @@ int ahci_platform_init_host(struct platform_device *pdev,
 	}
 
 	/* prepare host */
-	pi.private_data = (void *)hpriv->flags;
+	pi.private_data = (void *)(unsigned long)hpriv->flags;
 
 	ahci_save_initial_config(dev, hpriv);