UPSTREAM: sh: add support for TIF_NOTIFY_SIGNAL

[ Upstream commit 6d3a2733 ]

Wire up TIF_NOTIFY_SIGNAL handling for sh.

Cc: linux-sh@vger.kernel.org
Change-Id: If469e4a57e80bb31d749ca571d4039fc1680732e
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 3fde31e9)
Bug: 268174392
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>