change all other clock references to use nanosecond resolution accessors

This was done with:

    sed -i 's/qemu_get_clock\>/qemu_get_clock_ns/' \
        $(git grep -l 'qemu_get_clock\>' )
    sed -i 's/qemu_new_timer\>/qemu_new_timer_ns/' \
        $(git grep -l 'qemu_new_timer\>' )

after checking that get_clock and new_timer never occur twice
on the same line.  There were no missed occurrences; however, even
if there had been, they would have been caught by the compiler.

There was exactly one false positive in qemu_run_timers:

     -    current_time = qemu_get_clock (clock);
     +    current_time = qemu_get_clock_ns (clock);

which is of course not in this patch.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/hw/rc4030.c b/hw/rc4030.c
index 0a9d98d..d30230a 100644
--- a/hw/rc4030.c
+++ b/hw/rc4030.c
@@ -104,7 +104,7 @@
 
     tm_hz = 1000 / (s->itr + 1);
 
-    qemu_mod_timer(s->periodic_timer, qemu_get_clock(vm_clock) +
+    qemu_mod_timer(s->periodic_timer, qemu_get_clock_ns(vm_clock) +
                    get_ticks_per_sec() / tm_hz);
 }
 
@@ -811,7 +811,7 @@
     *irqs = qemu_allocate_irqs(rc4030_irq_jazz_request, s, 16);
     *dmas = rc4030_allocate_dmas(s, 4);
 
-    s->periodic_timer = qemu_new_timer(vm_clock, rc4030_periodic_timer, s);
+    s->periodic_timer = qemu_new_timer_ns(vm_clock, rc4030_periodic_timer, s);
     s->timer_irq = timer;
     s->jazz_bus_irq = jazz_bus;