[PATCH v3 7/7] mmc: Only descend into mmc directory when CONFIG_MMC is set

[kbuild test robot]

Hi Andrew,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.11-rc2 next-20170310]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Andrew-F-Davis/Remove-unneeded-build-directory-traversals/20170318-040719
config: x86_64-allmodconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   arch/x86/built-in.o: In function `mrfld_sd_init':
>> platform_mrfld_sd.c:(.init.text+0x397d5): undefined reference to `sdhci_pci_get_data'
   platform_mrfld_sd.c:(.init.text+0x397e3): undefined reference to `sdhci_pci_get_data'

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