hv: implement SRIOV VF_BAR initialization

All SRIOV VF physical devices don't have bars in configuration space,
they are from the VF associated PF's VF_BAR registers of SRIOV capability.

Adding a vbars data structure in pci_cap_sriov data structure to store
SRIOV VF_BAR information, so that each VF bars can be initialized directly
through the vbars instead multiple accessing of the PF VF_BAR registers.

Tracked-On: #4433

Signed-off-by: Yuan Liu <yuan1.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

hypervisor/include/dm/vpci.h

@@ -73,6 +73,12 @@ struct pci_msix {
 struct pci_cap_sriov {
 	uint32_t  capoff;
 	uint32_t  caplen;
+
+	/*
+	 * If the vdev is a SRIOV PF vdev, the vbars is used to store
+	 * the bar information that is using to initialize SRIOV VF vdev bar.
+	 */
+	struct pci_vbar vbars[PCI_BAR_COUNT];
 };
 
 union pci_cfgdata {