UPSTREAM: sparc: add support for TIF_NOTIFY_SIGNAL

[ Upstream commit f50a7052 ]

Wire up TIF_NOTIFY_SIGNAL handling for sparc.

Cc: sparclinux@vger.kernel.org
Change-Id: I6dc91c146efed1287ead67fa44db9185576cbce8
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit e1402ba4)
Bug: 268174392
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>