PCI: intel-gw: Rename intel_pcie_port to intel_pcie

Rename struct intel_pcie_port to intel_pcie to match the convention of
<driver>_pcie. No functional change intended.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Fan Fei <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Cc: Rahul Tanwar <[email protected]>

Author: firebolt007