Fix edk2 coverage build due to changed definition of EFI_PCI_IO_PROTOCOL_IO_MEM

[tklengyel]

/src/hbfa-fl/HBFA/UefiHostFuzzTestCasePkg/TestStub/VirtioPciDevice10StubLib/VirtioPciDevice10StubLib.c:857:19: error: incompatible function pointer types assigning to 'EFI_PCI_IO_PROTOCOL_CONFIG' (aka 'unsigned long long (*)(struct _EFI_PCI_IO_PROTOCOL *, EFI_PCI_IO_PROTOCOL_WIDTH, unsigned int, unsigned long long, void *)') from 'EFI_STATUS (*)(EFI_PCI_IO_PROTOCOL *, EFI_PCI_IO_PROTOCOL_WIDTH, UINT16, UINT16, UINT8 *)' (aka 'unsigned long long (*)(struct _EFI_PCI_IO_PROTOCOL *, EFI_PCI_IO_PROTOCOL_WIDTH, unsigned short, unsigned short, unsigned char *)') [-Wincompatible-function-pointer-types]
  857 |   PciIo->Pci.Read = &PciIoRead;