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/at91sam9rlek.h b/include/configs/at91sam9rlek.h
index b79c8ba..e1111b6 100644
--- a/include/configs/at91sam9rlek.h
+++ b/include/configs/at91sam9rlek.h
@@ -17,8 +17,8 @@
 #define CONFIG_SYS_AT91_MAIN_CLOCK	12000000	/* main clock xtal */
 
 /* SDRAM */
-#define CONFIG_SYS_SDRAM_BASE		ATMEL_BASE_CS1
-#define CONFIG_SYS_SDRAM_SIZE		0x04000000
+#define CFG_SYS_SDRAM_BASE		ATMEL_BASE_CS1
+#define CFG_SYS_SDRAM_SIZE		0x04000000
 
 #define CONFIG_SYS_INIT_RAM_SIZE	(16 * 1024)
 #define CONFIG_SYS_INIT_RAM_ADDR	ATMEL_BASE_SRAM