sh: add init member to pci_channel data

This patch adds an init callback to struct pci_channel and makes sure
it is initialized properly. Code is added to call this init function
from pcibios_init(). Return values are adjusted and a warning is is
printed if init fails.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/drivers/pci/ops-snapgear.c b/arch/sh/drivers/pci/ops-snapgear.c
index cba8015..2e254c6 100644
--- a/arch/sh/drivers/pci/ops-snapgear.c
+++ b/arch/sh/drivers/pci/ops-snapgear.c
@@ -40,7 +40,7 @@
 };
 
 struct pci_channel board_pci_channels[] = {
-	{ &sh4_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
+	{ sh7751_pci_init, &sh4_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
 	{ 0, }
 };