serial: ns16550: Group reg_* members of ns16550_platdata

Group reg_* members of struct ns16550_platdata together for better maintenance.

No functional change intended.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

include/ns16550.h

@@ -55,8 +55,8 @@
 struct ns16550_platdata {
 	unsigned long base;
 	int reg_shift;
-	int clock;
 	int reg_offset;
+	int clock;
 	u32 fcr;
 };