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/bmips_bcm6358.h b/include/configs/bmips_bcm6358.h
index e31b8bc..d564a32 100644
--- a/include/configs/bmips_bcm6358.h
+++ b/include/configs/bmips_bcm6358.h
@@ -9,7 +9,7 @@
 #include <linux/sizes.h>
 
 /* RAM */
-#define CONFIG_SYS_SDRAM_BASE		0x80000000
+#define CFG_SYS_SDRAM_BASE		0x80000000
 
 /* U-Boot */