OvmfPkg/VirtioFsDxe: implement the wrapper function for FUSE_CREATE

Add the VirtioFsFuseOpenOrCreate() function, for sending the FUSE_CREATE
command to the Virtio Filesystem device.

Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3097
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20201216211125.19496-21-lersek@redhat.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@arm.com>

OvmfPkg/VirtioFsDxe/VirtioFsDxe.h

@@ -286,6 +286,15 @@ VirtioFsFuseOpenDir (
      OUT UINT64    *FuseHandle
   );
 
+EFI_STATUS
+VirtioFsFuseOpenOrCreate (
+  IN OUT VIRTIO_FS *VirtioFs,
+  IN     UINT64    ParentNodeId,
+  IN     CHAR8     *Name,
+     OUT UINT64    *NodeId,
+     OUT UINT64    *FuseHandle
+  );
+
 //
 // EFI_SIMPLE_FILE_SYSTEM_PROTOCOL member functions for the Virtio Filesystem
 // driver.