[PATCH v3 2/4] regulator: Add driver for MT6331 PMIC regulators

[kernel test robot]

Hi AngeloGioacchino,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on broonie-regulator/for-next]
[also build test ERROR on v5.18 next-20220526]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/intel-lab-lkp/linux/commits/AngeloGioacchino-Del-Regno/MediaTek-Helio-X10-MT6795-MT6331-6332-Regulators/20220523-235049
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git for-next
config: i386-allmodconfig (https://download.01.org/0day-ci/archive/20220526/202205261929.FCVQ5SD3-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 3d546191ad9d7d2ad2c7928204b9de51deafa675)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/6dc66c0e54d0e22f6688e5b61d2740e0b839fc1e
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review AngeloGioacchino-Del-Regno/MediaTek-Helio-X10-MT6795-MT6331-6332-Regulators/20220523-235049
        git checkout 6dc66c0e54d0e22f6688e5b61d2740e0b839fc1e
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/regulator/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp at intel.com>

All errors (new ones prefixed by >>):

>> drivers/regulator/mt6331-regulator.c:15:10: fatal error: 'linux/mfd/mt6331/registers.h' file not found
   #include <linux/mfd/mt6331/registers.h>
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 error generated.


vim +15 drivers/regulator/mt6331-regulator.c

     9	
    10	#include <linux/module.h>
    11	#include <linux/of.h>
    12	#include <linux/platform_device.h>
    13	#include <linux/regmap.h>
    14	#include <linux/mfd/mt6397/core.h>
  > 15	#include <linux/mfd/mt6331/registers.h>
    16	#include <linux/regulator/driver.h>
    17	#include <linux/regulator/machine.h>
    18	#include <linux/regulator/mt6331-regulator.h>
    19	#include <linux/regulator/of_regulator.h>
    20	

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