global: Move remaining CONFIG_SYS_SDRAM_* to CFG_SYS_SDRAM_*

The rest of the unmigrated CONFIG symbols in the CONFIG_SYS_SDRAM
namespace do not easily transition to Kconfig. In many cases they likely
should come from the device tree instead. Move these out of CONFIG
namespace and in to CFG namespace.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/mt8518.h b/include/configs/mt8518.h
index 7cabbef..8a8bc85 100644
--- a/include/configs/mt8518.h
+++ b/include/configs/mt8518.h
@@ -10,8 +10,8 @@
 #define __MT8518_H
 
 /* DRAM definition */
-#define CONFIG_SYS_SDRAM_BASE			0x40000000
-#define CONFIG_SYS_SDRAM_SIZE			0x20000000
+#define CFG_SYS_SDRAM_BASE			0x40000000
+#define CFG_SYS_SDRAM_SIZE			0x20000000
 
 /* Uboot definition */