hw/vfio/common: Include missing 'system/tcg.h' header

Always include necessary headers explicitly, to avoid
when refactoring unrelated ones:

  hw/vfio/common.c:1176:45: error: implicit declaration of function ‘tcg_enabled’;
   1176 |                                             tcg_enabled() ? DIRTY_CLIENTS_ALL :
        |                                             ^~~~~~~~~~~

Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
Reviewed-by: Pierrick Bouvier <[email protected]>
Reviewed-by: Richard Henderson <[email protected]>
Reviewed-by: Cédric Le Goater <[email protected]>
Reviewed-by: Eric Auger <[email protected]>
Message-Id: <[email protected]>
Link: https://lore.kernel.org/qemu-devel/[email protected]
Signed-off-by: Cédric Le Goater <[email protected]>

Author: philmd

hw/vfio/common.c

@@ -42,6 +42,7 @@
 #include "migration/misc.h"
 #include "migration/blocker.h"
 #include "migration/qemu-file.h"
+#include "system/tcg.h"
 #include "system/tpm.h"
 
 VFIODeviceList vfio_device_list =