[ Upstream commit 0387662d ]

Makefile contains -D_GNU_SOURCE. remove define "_GNU_SOURCE"
in c files.
Signed-off-by: NPeng Hao <peng.hao2@zte.com.cn>
Signed-off-by: NShuah Khan (Samsung OSG) <shuah@kernel.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>