global: Move remaining CONFIG_SYS_* to CFG_SYS_*

The rest of the unmigrated CONFIG symbols in the CONFIG_SYS 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 f78ce41..c9cfadd 100644
--- a/include/configs/stm32mp15_common.h
+++ b/include/configs/stm32mp15_common.h
@@ -19,7 +19,7 @@
  * For booting Linux, use the first 256 MB of memory, since this is
  * the maximum mapped by the Linux kernel during initialization.
  */
-#define CONFIG_SYS_BOOTMAPSZ		SZ_256M
+#define CFG_SYS_BOOTMAPSZ		SZ_256M
 
 /* NAND support */