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/arch/arm/mach-tegra/board2.c b/arch/arm/mach-tegra/board2.c
index 82d3d33..54bbd8a 100644
--- a/arch/arm/mach-tegra/board2.c
+++ b/arch/arm/mach-tegra/board2.c
@@ -370,7 +370,7 @@
 
 	/* fall back to default DRAM bank size computation */
 
-	gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
+	gd->bd->bi_dram[0].start = CFG_SYS_SDRAM_BASE;
 	gd->bd->bi_dram[0].size = usable_ram_size_below_4g();
 
 #ifdef CONFIG_PCI
@@ -412,5 +412,5 @@
 
 	/* fall back to default usable RAM computation */
 
-	return CONFIG_SYS_SDRAM_BASE + usable_ram_size_below_4g();
+	return CFG_SYS_SDRAM_BASE + usable_ram_size_below_4g();
 }