arc-linux-ld: drivers/pci/controller/cadence/pcie-cadence-plat.c:113:undefined reference to `cdns_pcie_ep_setup'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   6b5a2b7d9bc156e505f09e698d85d6a1547c1206
commit: 69dc538a4f5a57dcc5ea4893c769d567f539a1b1 iommufd: Fix building without dmabuf
date:   6 months ago
config: arc-randconfig-r132-20260616 (https://download.01.org/0day-ci/archive/20260617/202606170021.m18QDxF2-lkp@xxxxxxxxx/config)
compiler: arc-linux-gcc (GCC) 13.4.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260617/202606170021.m18QDxF2-lkp@xxxxxxxxx/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
| Fixes: 69dc538a4f5a ("iommufd: Fix building without dmabuf")
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202606170021.m18QDxF2-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

   arc-linux-ld: drivers/pci/controller/cadence/pcie-cadence-plat.o: in function `cdns_plat_pcie_probe':
   drivers/pci/controller/cadence/pcie-cadence-plat.c:113:(.text+0x15a): undefined reference to `cdns_pcie_ep_setup'
>> arc-linux-ld: drivers/pci/controller/cadence/pcie-cadence-plat.c:113:(.text+0x15a): undefined reference to `cdns_pcie_ep_setup'

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