cputlb: drop flush_global flag from tlb_flush

We have never has the concept of global TLB entries which would avoid
the flush so we never actually use this flag. Drop it and make clear
that tlb_flush is the sledge-hammer it has always been.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
[DG: ppc portions]
Acked-by: David Gibson <david@gibson.dropbear.id.au>

target/openrisc/interrupt.c

@@ -45,7 +45,7 @@ void openrisc_cpu_do_interrupt(CPUState *cs)
 
     /* For machine-state changed between user-mode and supervisor mode,
        we need flush TLB when we enter&exit EXCP.  */
-    tlb_flush(cs, 1);
+    tlb_flush(cs);
 
     env->esr = env->sr;
     env->sr &= ~SR_DME;