PCI: rcar-host: Remove unused static pcie_base and pcie_dev

PCI: rcar-host: Remove unused static pcie_base and pcie_dev

After the L1 link state transition exception handler rework, the static
copies of the remapped PCIe controller address and the PCIe device
pointer became unused.  Remove them.

Link: https://lore.kernel.org/r/f29a8c37bd906dfbe23208cc2b089da17e339a75.1684857051.git.geert+renesas@glider.be
Fixes: 6e36203bc14ce147 ("PCI: rcar: Use PCI_SET_ERROR_RESPONSE after read which triggered an exception")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>