replace muldiv64(a, b, c) by (uint64_t)a * b / c

When "a" and "b" are 32bit values, we don't have to cast
them to 128bit, 64bit is enough.

This patch is the result of coccinelle script
scripts/coccinelle/simplify_muldiv64.cocci

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
For xtensa PIC:
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

hw/audio/gus.c

@@ -144,7 +144,7 @@ static void GUS_callback (void *opaque, int free)
     s->left = samples;
 
  reset:
-    gus_irqgen (&s->emu, muldiv64 (net, 1000000, s->freq));
+    gus_irqgen (&s->emu, (uint64_t)net * 1000000 / s->freq);
 }
 
 int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n)

hw/xtensa/pic_cpu.c

@@ -122,8 +122,8 @@ void xtensa_rearm_ccompare_timer(CPUXtensaState *env)
     }
     env->wake_ccount = wake_ccount;
     timer_mod(env->ccompare_timer, env->halt_clock +
-            muldiv64(wake_ccount - env->sregs[CCOUNT],
-                1000000, env->config->clock_freq_khz));
+            (uint64_t)(wake_ccount - env->sregs[CCOUNT]) *
+            1000000 / env->config->clock_freq_khz);
 }
 
 static void xtensa_ccompare_cb(void *opaque)