[radeon-alex:drm-next-4.15-wip 156/283] ci_smc.c:(.text+0xab0): multiple definition of `ci_send_msg_to_smc'

[kbuild test robot]

tree:   git://people.freedesktop.org/~agd5f/linux.git drm-next-4.15-wip
head:   92c7dfc70d8bd57e4ffae528418fb8a039ea26cb
commit: 9f4b35411cfed96d4f9f092b2fed14905af84d89 [156/283] drm/amd/powerplay: add CI asics support to smumgr (v3)
config: i386-randconfig-c0-10010618 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
        git checkout 9f4b35411cfed96d4f9f092b2fed14905af84d89
        # save the attached .config to linux build tree
        make ARCH=i386 

Note: the radeon-alex/drm-next-4.15-wip HEAD 92c7dfc70d8bd57e4ffae528418fb8a039ea26cb builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   drivers/gpu/drm/amd/powerplay/smumgr/ci_smc.o: In function `ci_send_msg_to_smc':
>> ci_smc.c:(.text+0xab0): multiple definition of `ci_send_msg_to_smc'
   drivers/gpu/drm/radeon/ci_smc.o:ci_smc.c:(.text+0x300): first defined here

---
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