tty: include list & lockdep from tty_ldisc.h

We use structs list_head and lockdep_map as non-pointers in tty_ldisc.h.
So better have headers defining them explicitly included so that the
structs are always defined. Not only implicitly via random include
chains.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210723103147.18250-5-jslaby@suse.czSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/tty_ldisc.h

@@ -128,6 +128,8 @@ struct tty_struct;
 #include <linux/fs.h>
 #include <linux/wait.h>
 #include <linux/atomic.h>
+#include <linux/list.h>
+#include <linux/lockdep.h>
 #include <linux/seq_file.h>
 
 /*