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/imx8qxp_mek.h b/include/configs/imx8qxp_mek.h
index 567351f..19f1dba 100644
--- a/include/configs/imx8qxp_mek.h
+++ b/include/configs/imx8qxp_mek.h
@@ -103,7 +103,7 @@
 
 /* On LPDDR4 board, USDHC1 is for eMMC, USDHC2 is for SD on CPU board */
 
-#define CONFIG_SYS_SDRAM_BASE		0x80000000
+#define CFG_SYS_SDRAM_BASE		0x80000000
 #define PHYS_SDRAM_1			0x80000000
 #define PHYS_SDRAM_2			0x880000000
 #define PHYS_SDRAM_1_SIZE		0x80000000	/* 2 GB */