drivers/fsl_pci_init: Fix inbound window mapping bug

The current code will cause the creation of a 4GB window
starting at 0 if we have more than 4GB of RAM installed,
which overlaps with PCI_MEM space and causes pci_bus_to_phys()
to return erroneous information. Limit the size to 4GB - 1;
which causes the code to create one 2GB and one 1GB window
instead.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Andy Fleming <afleming@freescale.com>

drivers/pci/fsl_pci_init.c

@@ -58,7 +58,7 @@ void pciauto_config_init(struct pci_controller *hose);
 int fsl_pci_setup_inbound_windows(struct pci_region *r)
 {
 	struct pci_region *rgn_base = r;
-	u64 sz = min((u64)gd->ram_size, 1ull << 32);
+	u64 sz = min((u64)gd->ram_size, (1ull << 32) - 1);
 
 	phys_addr_t phys_start = CONFIG_SYS_PCI_MEMORY_PHYS;
 	pci_addr_t bus_start = CONFIG_SYS_PCI_MEMORY_BUS;