global: Migrate CONFIG_MAX_MEM_MAPPED to CFG

Perform a simple rename of CONFIG_MAX_MEM_MAPPED to CFG_MAX_MEM_MAPPED

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/include/asm/arch-ls102xa/config.h b/arch/arm/include/asm/arch-ls102xa/config.h
index 4a4d642..d0abbda 100644
--- a/arch/arm/include/asm/arch-ls102xa/config.h
+++ b/arch/arm/include/asm/arch-ls102xa/config.h
@@ -70,7 +70,7 @@
 /* SATA */
 #define AHCI_BASE_ADDR				(CONFIG_SYS_IMMR + 0x02200000)
 #ifdef CONFIG_DDR_SPD
-#define CONFIG_MAX_MEM_MAPPED			((phys_size_t)2 << 30)
+#define CFG_MAX_MEM_MAPPED			((phys_size_t)2 << 30)
 #endif
 
 #define DCU_LAYER_MAX_NUM			16