pci: Rename PCI_REGION_MEMORY to PCI_REGION_SYS_MEMORY for clarity

The PCI_REGION_MEMORY and PCI_REGION_MEM are a bit to similar and
can be confusing when reading the code.

Rename PCI_REGION_MEMORY to PCI_REGION_SYS_MEMORY to clarify its used
for system memory mapping purposes.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/cpu/mcf5445x/pci.c b/cpu/mcf5445x/pci.c
index c4a3b05..7f9784c 100644
--- a/cpu/mcf5445x/pci.c
+++ b/cpu/mcf5445x/pci.c
@@ -146,7 +146,7 @@
 
 	pci_set_region(hose->regions + 2, CONFIG_SYS_PCI_SYS_MEM_BUS,
 		       CONFIG_SYS_PCI_SYS_MEM_PHYS, CONFIG_SYS_PCI_SYS_MEM_SIZE,
-		       PCI_REGION_MEM | PCI_REGION_MEMORY);
+		       PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
 
 	hose->region_count = 3;