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/tplink_wdr4300.h b/include/configs/tplink_wdr4300.h
index 22d783c..1378981 100644
--- a/include/configs/tplink_wdr4300.h
+++ b/include/configs/tplink_wdr4300.h
@@ -6,7 +6,7 @@
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
-#define CONFIG_SYS_SDRAM_BASE		0xa0000000
+#define CFG_SYS_SDRAM_BASE		0xa0000000
 
 #define CONFIG_SYS_INIT_RAM_ADDR	0xbd000000
 #define CONFIG_SYS_INIT_RAM_SIZE	0x8000