ERROR: "spmi_ext_register_writel" [drivers/base/regmap/regmap-spmi.ko] undefined!

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   32b88194f71d6ae7768a29f87fbba454728273ee
commit: ccf79c238f1a06a801b4c4449b9bc8a42be2c7bc Merge tag 'v4.3-rc3' into x86/urgent, before applying dependent fix
date:   4 weeks ago
config: i386-randconfig-c0-10251451 (attached as .config)
reproduce:
        git checkout ccf79c238f1a06a801b4c4449b9bc8a42be2c7bc
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

>> ERROR: "spmi_ext_register_writel" [drivers/base/regmap/regmap-spmi.ko] undefined!
>> ERROR: "spmi_ext_register_write" [drivers/base/regmap/regmap-spmi.ko] undefined!
>> ERROR: "spmi_ext_register_readl" [drivers/base/regmap/regmap-spmi.ko] undefined!
>> ERROR: "spmi_ext_register_read" [drivers/base/regmap/regmap-spmi.ko] undefined!
>> ERROR: "spmi_register_write" [drivers/base/regmap/regmap-spmi.ko] undefined!
>> ERROR: "spmi_register_zero_write" [drivers/base/regmap/regmap-spmi.ko] undefined!
>> ERROR: "spmi_register_read" [drivers/base/regmap/regmap-spmi.ko] undefined!

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