PCI: aardvark: Add support for DEVCAP2, DEVCTL2, LNKCAP2 and LNKCTL2 registers on...

PCI: aardvark: Add support for DEVCAP2, DEVCTL2, LNKCAP2 and LNKCTL2 registers on emulated bridge

BugLink: https://bugs.launchpad.net/bugs/1978240
commit 1d3e170344dff2cef8827db6c09909b78cbc11d7 upstream.

PCI aardvark hardware supports access to DEVCAP2, DEVCTL2, LNKCAP2 and
LNKCTL2 configuration registers of PCIe core via PCIE_CORE_PCIEXP_CAP.
Export them via emulated software root bridge.

Link: https://lore.kernel.org/r/20211130172913.9727-4-kabel@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>