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>

arch/sh/drivers/pci/ops-sdk7780.c

@@ -49,7 +49,7 @@ static struct resource sdk7780_mem_resource = {
 };
 
 struct pci_channel board_pci_channels[] = {
-	{ &sh4_pci_ops, &sdk7780_io_resource, &sdk7780_mem_resource, 0, 0xff },
+	{ sh7780_pci_init, &sh4_pci_ops, &sdk7780_io_resource, &sdk7780_mem_resource, 0, 0xff },
 	{ NULL, NULL, NULL, 0, 0 },
 };
 EXPORT_SYMBOL(board_pci_channels);