Revert "[cns3xxx]: clean up PCI bus topology" (r35079)

It breaks PCIe IRQ mapping and possibly other things

SVN-Revision: 35842

target/linux/cns3xxx/patches-3.3/066-pcie_bus_topology.patch

@@ -1,27 +0,0 @@
---- a/arch/arm/mach-cns3xxx/pcie.c
-+++ b/arch/arm/mach-cns3xxx/pcie.c
-@@ -79,9 +79,11 @@ static void __iomem *cns3xxx_pci_cfg_bas
- 	 * the first device on the same bus as the CNS PCI bridge.
- 	 */
- 	if (busno == 0) {
--		if (slot > 1)
-+		if (slot > 0)
- 			return NULL;
- 		type = slot;
-+	} else if (busno == 1) {
-+		type = CNS3XXX_CFG0_TYPE;
- 	} else {
- 		type = CNS3XXX_CFG1_TYPE;
- 	}
-@@ -428,8 +430,9 @@ static void __init cns3xxx_pcie_hw_init(
- 	if (!cnspci->linked)
- 		return;
- 
--	/* Set Device Max_Read_Request_Size to 128 byte */
--	devfn = PCI_DEVFN(1, 0);
-+	/* Configure Root Complex: Set Device Max_Read_Request_Size to 128 byte */
-+	bus.number = 1;
-+	devfn = PCI_DEVFN(0, 0);
- 	pos = pci_bus_find_capability(&bus, devfn, PCI_CAP_ID_EXP);
- 	pci_bus_read_config_word(&bus, devfn, pos + PCI_EXP_DEVCTL, &dc);
- 	dc &= ~(0x3 << 12);	/* Clear Device Control Register [14:12] */