Move PCIe config space capability search API to common DesignWare file
as this can be used by both host and EP mode drivers.
Signed-off-by: NVidya Sagar <vidyaos@nvidia.com>
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: NThierry Reding <treding@nvidia.com>
Acked-by: NGustavo Pimentel <gustavo.pimentel@synopsys.com>