c6x: add support for TIF_NOTIFY_SIGNAL

stable inclusion
from stable-v5.10.162
commit c82617d9decc3c5af2ab2c66055701f7fbd944f6
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7P7OH

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=c82617d9decc3c5af2ab2c66055701f7fbd944f6



--------------------------------

[ Upstream commit 6d665a4d ]

Wire up TIF_NOTIFY_SIGNAL handling for c6x.

Cc: linux-c6x-dev@linux-c6x.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>