tty: Fix comments for tty_ldisc_get()

tty_ldisc_get() returns ERR_PTR() values if unsuccessful, not NULL;
fix function header documentation.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2016-01-10 22:40:59 -08:00 • committed by Greg Kroah-Hartman
commit c0cc1c5d6b