pci-epf-test.c:undefined reference to `crc32_le'

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   5ad9345d2321eb1442794098506d136d01cf8345
commit: 349e7a85b25fa6ee82902d9be2cc5f3bec815120 PCI: endpoint: functions: Add an EP function to test PCI
date:   9 weeks ago
config: x86_64-randconfig-s1-06120830 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        git checkout 349e7a85b25fa6ee82902d9be2cc5f3bec815120
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   drivers/built-in.o: In function `pci_epf_test_cmd_handler':
>> pci-epf-test.c:(.text+0x2d98d): undefined reference to `crc32_le'
   pci-epf-test.c:(.text+0x2da97): undefined reference to `crc32_le'

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