hvf: Use cpu_synchronize_state()

hvf: Use cpu_synchronize_state()

There is no reason to call the hvf specific hvf_cpu_synchronize_state()
when we can just use the generic cpu_synchronize_state() instead. This
allows us to have less dependency on internal function definitions and
allows us to make hvf_cpu_synchronize_state() static.

Signed-off-by: Alexander Graf <[email protected]>
Reviewed-by: Sergio Lopez <[email protected]>
Message-id: 20210519202253[email protected]
Reviewed-by: Peter Maydell <[email protected]>
Signed-off-by: Peter Maydell <[email protected]>