[PATCH 4/5] powerpc/zImage: Rework serial driver probing

[kbuild test robot]

Hi Oliver,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on v4.16-rc4]
[also build test ERROR on next-20180319]
[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/Oliver-O-Halloran/powerpc-zImage-Remove-ifdef-in-opal-c/20180320-023705
config: powerpc64-alldefconfig (attached as .config)
compiler: powerpc-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=powerpc64 

All errors (new ones prefixed by >>):

   arch/powerpc/boot/wrapper.a(crt0.o): In function `_zimage_start_opd':
>> (.text+0x0): multiple definition of `_zimage_start_opd'
   arch/powerpc/boot/crt0.o:(.text+0x0): first defined here
   arch/powerpc/boot/wrapper.a(crt0.o): In function `_zimage_start':
>> (.text+0x24): multiple definition of `_zimage_start_lib'
   arch/powerpc/boot/crt0.o:(.text+0x24): first defined here

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