sh: fix pci io access for r2d boards

Use generic_io_base to point out the pci io window, and make sure the
highest port address used is SH7751_PCI_IO_SIZE - 1.

This patch fixes pci io port access for the r2d boards - CONFIG_8139TOO_PIO
now works as expected. So does the alsa driver for CMI8738.

Signed-off-by: Magnus Damm <[e-mail]>
Acked-by: Katsuya MATSUBARA <[e-mail]>
Signed-off-by: Paul Mundt <[e-mail]>

arch/sh/drivers/pci/ops-rts7751r2d.c

···
 static struct resource sh7751_io_resource = {
 	.name	= "SH7751_IO",
 	.start	= 0x4000,
-	.end	= 0x4000 + SH7751_PCI_IO_SIZE - 1,
+	.end	= SH7751_PCI_IO_SIZE - 1,
 	.flags	= IORESOURCE_IO
 };
 
···
 
 int __init pcibios_init_platform(void)
 {
+	__set_io_port_base(SH7751_PCI_IO_BASE);
 	return sh7751_pcic_init(&sh7751_pci_map);
 }