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/mpc8260/pci.c b/cpu/mpc8260/pci.c
index 378d6c5..f1e9bb4 100644
--- a/cpu/mpc8260/pci.c
+++ b/cpu/mpc8260/pci.c
@@ -410,12 +410,12 @@
 	pci_set_region (hose->regions + 0,
 			PCI_SLV_MEM_BUS,
 			PCI_SLV_MEM_LOCAL,
-			gd->ram_size, PCI_REGION_MEM | PCI_REGION_MEMORY);
+			gd->ram_size, PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
 #else
 	pci_set_region (hose->regions + 0,
 			CONFIG_SYS_SDRAM_BASE,
 			CONFIG_SYS_SDRAM_BASE,
-			0x4000000, PCI_REGION_MEM | PCI_REGION_MEMORY);
+			0x4000000, PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
 #endif
 
 	/* PCI memory space */