sh: Handle PCI controller resource conflicts.

register_pci_controller() can fail, but presently is a void function.
Change this over to an int so that we can bail early before continuing on
with post-registration initialization (such as throwing the controller in
to 66MHz mode in the case of the SH7780 host controller).

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/drivers/pci/pci-sh5.c b/arch/sh/drivers/pci/pci-sh5.c
index 873ed2b..bce73fa 100644
--- a/arch/sh/drivers/pci/pci-sh5.c
+++ b/arch/sh/drivers/pci/pci-sh5.c
@@ -216,8 +216,6 @@
 	sh5_mem_resource.start = memStart;
 	sh5_mem_resource.end = memStart + memSize;
 
-	register_pci_controller(&sh5pci_controller);
-
-	return 0;
+	return register_pci_controller(&sh5pci_controller);
 }
 arch_initcall(sh5pci_init);