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/smdk5420.h b/include/configs/smdk5420.h
index 12c2e1f..0392530 100644
--- a/include/configs/smdk5420.h
+++ b/include/configs/smdk5420.h
@@ -14,7 +14,7 @@
 
 #define CONFIG_SMDK5420			/* which is in a SMDK5420 */
 
-#define CONFIG_SYS_SDRAM_BASE	0x20000000
+#define CFG_SYS_SDRAM_BASE	0x20000000
 
 /* DRAM Memory Banks */
 #define SDRAM_BANK_SIZE		(512UL << 20UL)	/* 512 MB */