ksmbd: remove unneeded mark_inode_dirty in set_info_sec()

[ Upstream commit e4e14095 ]

mark_inode_dirty will be called in notify_change().
This patch remove unneeded mark_inode_dirty in set_info_sec().

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>