PCI: kirin: Remove unused assignments

hi3660_pcie_phy_init() assigned "pdev", but never used the value.  Drop it.

Found by Krzysztof using cppcheck:

  $ cppcheck --enable=all --force
  unreadVariable drivers/pci/controller/dwc/pcie-kirin.c:336 Variable 'pdev' is assigned a value that is never used.

Reported-by: Krzysztof Wilczyński <kw@linux.com>
Link: https://lore.kernel.org/r/20220313192933.434746-3-helgaas@kernel.org


Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>