Ensure correct boot volume is used to boot XTOS

xtldr/modules/xtos_o/xtos.c

@@ -323,7 +323,7 @@ XtBootSystem(IN PXTBL_BOOT_PARAMETERS Parameters)
                                Parameters->KernelFile, Parameters->Parameters);
 
     /* Open EFI volume */
-    Status = XtLdrProtocol->Disk.OpenVolume(NULL, &DiskHandle, &FsHandle);
+    Status = XtLdrProtocol->Disk.OpenVolume(Parameters->DevicePath, &DiskHandle, &FsHandle);
     if(Status != STATUS_EFI_SUCCESS)
     {
         /* Failed to open a volume */