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PCI: Versal CPM: Add support for Versal CPM Root Port driver
- Adding support for versal CPM as Root Port. - The Versal ACAP devices include CCIX-PCIe Module (CPM). The integrated block for CPM along with the integrated bridge can function as PCIe Root Port. - Versal CPM uses GICv3 ITS feature for assigning MSI/MSI-X vectors and handling MSI/MSI-X interrupts. - Bridge error and legacy interrupts in versal CPM are handled using versal CPM specific MISC interrupt line. Signed-off-by: Bharat Kumar Gogada <bharat.kumar.gogada@xilinx.com>
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