[PATCH v2 2/2] mfd: add documentation for ACT8945A DT bindings

Hi Wenyou,

[auto build test ERROR on ljones-mfd/for-mfd-next]
[also build test ERROR on v4.4 next-20160111]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Wenyou-Yang/mfd-act8945a-add-Active-semi-ACT8945A-PMIC-MFD-driver/20160112-161159
base:   https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next
config: x86_64-allmodconfig (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   drivers/built-in.o: In function `act8945a_i2c_probe':

quoted

act8945a.c:(.text+0x229476): undefined reference to `__devm_regmap_init_i2c'

   drivers/built-in.o: In function `act8945a_i2c_init':

quoted

act8945a.c:(.init.text+0x1a536): undefined reference to `i2c_register_driver'

   drivers/built-in.o: In function `act8945a_i2c_exit':

quoted

act8945a.c:(.exit.text+0x66f): undefined reference to `i2c_del_driver'

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0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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