[RESEND: RFC PATCH 2/3] pci: designware: enhancements to support keystone pcie

keystone pcie hardware is based on designware hw version 3.65. There is no support for ATU port and have registers in application space to configure inbound/outbound access. Also doesn't support PCI PVM option. So the MSI IRQ registers available in application space is used to mask/unmask/enable th

[PATCH 2/3] pci: designware: enhancements to support keystone pcie

keystone pcie hardware is based on designware hw version 3.65. There is no support for ATU port and have registers in application space to configure inbound/outbound access. Also doesn't support PCI PVM option. So the MSI IRQ registers available in application space is used to mask/unmask/enable th