tty_audit: make data of tty_audit_log() const

'data' are only read (passed down to audit_log_n_hex()), so they can be
const -- the same what is expected in audit_log_n_hex(). Only a minor
cleanup to be consistent.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20230621101611.10580-7-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Jiri Slaby

drivers/tty/tty_audit.c

@@ -59,7 +59,7 @@ static void tty_audit_buf_free(struct tty_audit_buf *buf)
 }
 
 static void tty_audit_log(const char *description, dev_t dev,
-			  unsigned char *data, size_t size)
+			  const unsigned char *data, size_t size)
 {
 	struct audit_buffer *ab;
 	pid_t pid = task_pid_nr(current);