Char: moxa, ioctl cleanup

- allow stats only for sys_admin
- move TCSBRK* processing to .break_ctl tty op
- let TIOCGSOFTCAR and TIOCSSOFTCAR be processed by ldisc
- remove MOXA_GET_MAJOR, MOXA_GET_CUMAJOR
- fix jiffies subtraction by time_after
- move moxa ioctl numbers into the header; still not exported to userspace,
  needs _IOC and 32/64 compat cleanup anyways
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Tested-by: Oyvind Aabling <Oyvind.Aabling@uni-c.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/char/moxa.h

 #ifndef MOXA_H_FILE
 #define MOXA_H_FILE
 
+#define	MOXA		0x400
+#define MOXA_GET_IQUEUE 	(MOXA + 1)	/* get input buffered count */
+#define MOXA_GET_OQUEUE 	(MOXA + 2)	/* get output buffered count */
+#define MOXA_GETDATACOUNT       (MOXA + 23)
+#define MOXA_GET_IOQUEUE	(MOXA + 27)
+#define MOXA_FLUSH_QUEUE	(MOXA + 28)
+#define MOXA_GETMSTATUS         (MOXA + 65)
+
 /*
  *    System Configuration
  */