tty: fix kernel-doc for functions in tty.h

tty_kref_get() is already included in Documentation, but is not properly
formatted. Fix this.

tty_get_baud_rate() is neither properly formatted, nor is included. Fix
both.

Signed-off-by: "Jiri Slaby (SUSE)" <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

Documentation/driver-api/tty/tty_ioctl.rst

···
 =================
 
 .. kernel-doc:: drivers/tty/tty_ioctl.c
+
+.. kernel-doc:: include/linux/tty.h
+   :identifiers: tty_get_baud_rate

include/linux/tty.h

···
 extern const struct class tty_class;
 
 /**
- *	tty_kref_get		-	get a tty reference
- *	@tty: tty device
+ * tty_kref_get - get a tty reference
+ * @tty: tty device
  *
- *	Return a new reference to a tty object. The caller must hold
- *	sufficient locks/counts to ensure that their existing reference cannot
- *	go away
+ * Returns: a new reference to a tty object. The caller must hold sufficient
+ * locks/counts to ensure that their existing reference cannot go away
  */
-
 static inline struct tty_struct *tty_kref_get(struct tty_struct *tty)
 {
 	if (tty)
···
 		speed_t obaud);
 
 /**
- *	tty_get_baud_rate	-	get tty bit rates
- *	@tty: tty to query
+ * tty_get_baud_rate - get tty bit rates
+ * @tty: tty to query
  *
- *	Returns the baud rate as an integer for this terminal. The
- *	termios lock must be held by the caller and the terminal bit
- *	flags may be updated.
+ * Returns: the baud rate as an integer for this terminal. The termios lock
+ * must be held by the caller and the terminal bit flags may be updated.
  *
- *	Locking: none
+ * Locking: none
  */
 static inline speed_t tty_get_baud_rate(struct tty_struct *tty)
 {