global: Move remaining CONFIG_SYS_NS16550_* to CFG_SYS_NS16550_*

The rest of the unmigrated CONFIG symbols in the CONFIG_SYS_NS16550
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/ti_omap4_common.h b/include/configs/ti_omap4_common.h
index eb93034..ce50e35 100644
--- a/include/configs/ti_omap4_common.h
+++ b/include/configs/ti_omap4_common.h
@@ -27,9 +27,9 @@
 /*
  * Hardware drivers
  */
-#define CONFIG_SYS_NS16550_CLK		48000000
+#define CFG_SYS_NS16550_CLK		48000000
 #if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_DM_SERIAL)
-#define CONFIG_SYS_NS16550_COM3		UART3_BASE
+#define CFG_SYS_NS16550_COM3		UART3_BASE
 #endif
 
 /* TWL6030 */