wifi: Add for kernel-4.14 support

Update driver for kernel-4.14 support

Test: Build pass and test OK

Change-Id: I748b378bb8246d126b2a375629a98a3a453582f0
CR-Id: AUTO00014958
Signed-off-by: Shengxi Xu <shengxi.xu@mediatek.com>
Reviewed-on: http://gerrit.mediatek.inc:8080/1655166
CheckPatch: Check Patch <srv_checkpatch@mediatek.com>
Reviewed-by: Jiehang Zheng <jiehang.zheng@mediatek.com>
Tested-by: Jiehang Zheng <jiehang.zheng@mediatek.com>