Merge patch series "drivers: pci: pcie_dw_common: Add dw_pcie_link_set_max_link_width()"

This patch set from Marek Vasut <marek.vasut+renesas@mailbox.org>
introduces dw_pcie_link_set_max_link_width() similar to the Linux Kernel
and then migrates the current platform drivers to use it. Next it adds
support for Renesas R-Car Gen4 platforms and enables it on one.

Link: https://lore.kernel.org/r/20250617081641.8385-1-marek.vasut+renesas@mailbox.org

diff --cc configs/r8a779g3_sparrowhawk_defconfig
Simple merge