PCI: Add T_PVPERL macro

According to the PCIe CEM r5.0, sec 2.9.2, Power stable to PERST#
inactive interval is 100 ms as minimum. Add a macro so that the PCIe
controller drivers can make use of it.

Link: https://lore.kernel.org/linux-pci/20231018085631.1121289-2-yoshihiro.shimoda.uh@renesas.com


Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>