[PATCH net-next 7/9] net: pcs: xpcs: allow lane polarity inversion

[kernel test robot]

Hi Vladimir,

kernel test robot noticed the following build errors:

[auto build test ERROR on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Vladimir-Oltean/dt-bindings-phy-rename-transmit-amplitude-yaml-to-phy-common-props-yaml/20251123-033900
base:   net-next/main
patch link:    https://lore.kernel.org/r/20251122193341.332324-8-vladimir.oltean%40nxp.com
patch subject: [PATCH net-next 7/9] net: pcs: xpcs: allow lane polarity inversion
config: arm-spear6xx_defconfig (https://download.01.org/0day-ci/archive/20251126/202511262216.TzyLet3B-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9e9fe08b16ea2c4d9867fb4974edf2a3776d6ece)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251126/202511262216.TzyLet3B-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511262216.TzyLet3B-lkp@intel.com/

All errors (new ones prefixed by >>):

>> ld.lld: error: undefined symbol: phy_get_rx_polarity
   >>> referenced by pcs-xpcs.c:821 (drivers/net/pcs/pcs-xpcs.c:821)
   >>>               drivers/net/pcs/pcs-xpcs.o:(xpcs_do_config) in archive vmlinux.a
--
>> ld.lld: error: undefined symbol: phy_get_tx_polarity
   >>> referenced by pcs-xpcs.c:829 (drivers/net/pcs/pcs-xpcs.c:829)
   >>>               drivers/net/pcs/pcs-xpcs.o:(xpcs_do_config) in archive vmlinux.a

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