drivers/regulator/raa215300.c:42:12: sparse: sparse: symbol 'xin_name' was not declared. Should it be static?

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   c17414a273b81fe4e34e11d69fc30cc8b1431614
commit: 7bce16630837c705f72e8fd53a11ae8c236236f4 regulator: Add Renesas PMIC RAA215300 driver
date:   13 days ago
config: i386-randconfig-i061-20230706 (https://download.01.org/0day-ci/archive/20230706/202307061555.Gx6hEBT4-lkp@xxxxxxxxx/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce: (https://download.01.org/0day-ci/archive/20230706/202307061555.Gx6hEBT4-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202307061555.Gx6hEBT4-lkp@xxxxxxxxx/

sparse warnings: (new ones prefixed by >>)
>> drivers/regulator/raa215300.c:42:12: sparse: sparse: symbol 'xin_name' was not declared. Should it be static?

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