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/stm32mp15_common.h b/include/configs/stm32mp15_common.h
index b809f93..f78ce41 100644
--- a/include/configs/stm32mp15_common.h
+++ b/include/configs/stm32mp15_common.h
@@ -13,7 +13,7 @@
 /*
  * Configuration of the external SRAM memory used by U-Boot
  */
-#define CONFIG_SYS_SDRAM_BASE			STM32_DDR_BASE
+#define CFG_SYS_SDRAM_BASE			STM32_DDR_BASE
 
 /*
  * For booting Linux, use the first 256 MB of memory, since this is