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/imx7-cm.h b/include/configs/imx7-cm.h
index c6db5e9..e5118f1 100644
--- a/include/configs/imx7-cm.h
+++ b/include/configs/imx7-cm.h
@@ -69,7 +69,7 @@
 /* Physical Memory Map */
 #define PHYS_SDRAM					MMDC0_ARB_BASE_ADDR
 
-#define CONFIG_SYS_SDRAM_BASE		PHYS_SDRAM
+#define CFG_SYS_SDRAM_BASE		PHYS_SDRAM
 #define CONFIG_SYS_INIT_RAM_ADDR	IRAM_BASE_ADDR
 #define CONFIG_SYS_INIT_RAM_SIZE	IRAM_SIZE