[PATCH v1 6/7] Bluetooth: hci_mediatek: Add protocol support for MediaTek serial devices

[kbuild test robot]

Hi Sean,

I love your patch! Perhaps something to improve:

[auto build test WARNING on next-20180329]
[also build test WARNING on v4.16]
[cannot apply to linus/master bluetooth/master bluetooth-next/master v4.16 v4.16-rc7 v4.16-rc6]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/sean-wang-mediatek-com/add-support-for-Bluetooth-on-MT7622-SoC/20180403-160035
reproduce:
        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

>> drivers/bluetooth/hci_mediatek.c:322:5: sparse: symbol 'mtk_recv_frame' was not declared. Should it be static?
>> drivers/bluetooth/hci_mediatek.c:415:57: sparse: Using plain integer as NULL pointer

Please review and possibly fold the followup patch.

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