mm/cdm: enable CONFIG_COHERENT_DEVICE in hulk_defconfig and syzkaller_defconfig

hulk inclusion
category: bugfix
bugzilla: 16542
CVE: NA
-------------------

enable CONFIG_COHERENT_DEVICE in hulk_defconfig and
syzkaller_defconfig

Signed-off-by: Lijun Fang <fanglijun3@huawei.com>
Reviewed-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>