TTY: export NR_LDISC and N_* line discipline numbers to user-space

Since commit (4564f9e5: consolidate line discipline number definitions)
the patch moved all line discipline number from a per-architecture termios.h
to a shared one: tty.h. However, prior to this consolidation work, the
line discipline numbers were outside of an ifdef __KERNEL__/endif block
so these numbers used to be exported to user-space.

Since such numbers are kernel ABI anyway, and tty.h is already included
for user- space header processing, just move these relevant defines
outside of the ifdef __KERNEL__/endif block in include/linux/tty.h.

CC: Maxime Bizon <mbizon@freebox.fr>
Signed-off-by: Florian Fainelli <ffainelli@freebox.fr>
Acked-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

include/linux/tty.h

@@ -5,24 +5,6 @@
  * 'tty.h' defines some structures used by tty_io.c and some defines.
  */
 
-#ifdef __KERNEL__
-#include <linux/fs.h>
-#include <linux/major.h>
-#include <linux/termios.h>
-#include <linux/workqueue.h>
-#include <linux/tty_driver.h>
-#include <linux/tty_ldisc.h>
-#include <linux/mutex.h>
-
-#include <asm/system.h>
-
-
-/*
- * (Note: the *_driver.minor_start values 1, 64, 128, 192 are
- * hardcoded at present.)
- */
-#define NR_UNIX98_PTY_DEFAULT	4096      /* Default maximum for Unix98 ptys */
-#define NR_UNIX98_PTY_MAX	(1 << MINORBITS) /* Absolute limit */
 #define NR_LDISCS		30
 
 /* line disciplines */
@@ -53,6 +35,25 @@
 #define N_TRACESINK	23	/* Trace data routing for MIPI P1149.7 */
 #define N_TRACEROUTER	24	/* Trace data routing for MIPI P1149.7 */
 
+#ifdef __KERNEL__
+#include <linux/fs.h>
+#include <linux/major.h>
+#include <linux/termios.h>
+#include <linux/workqueue.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_ldisc.h>
+#include <linux/mutex.h>
+
+#include <asm/system.h>
+
+
+/*
+ * (Note: the *_driver.minor_start values 1, 64, 128, 192 are
+ * hardcoded at present.)
+ */
+#define NR_UNIX98_PTY_DEFAULT	4096      /* Default maximum for Unix98 ptys */
+#define NR_UNIX98_PTY_MAX	(1 << MINORBITS) /* Absolute limit */
+
 /*
  * This character is the same as _POSIX_VDISABLE: it cannot be used as
  * a c_cc[] character, but indicates that a particular special character