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/soc_dma.c b/hw/soc_dma.c
index 23ec516..3f0f414 100644
--- a/hw/soc_dma.c
+++ b/hw/soc_dma.c
@@ -84,7 +84,7 @@
 
 static void soc_dma_ch_schedule(struct soc_dma_ch_s *ch, int delay_bytes)
 {
-    int64_t now = qemu_get_clock(vm_clock);
+    int64_t now = qemu_get_clock_ns(vm_clock);
     struct dma_s *dma = (struct dma_s *) ch->dma;
 
     qemu_mod_timer(ch->timer, now + delay_bytes / dma->channel_freq);
@@ -246,7 +246,7 @@
     for (i = 0; i < n; i ++) {
         s->ch[i].dma = &s->soc;
         s->ch[i].num = i;
-        s->ch[i].timer = qemu_new_timer(vm_clock, soc_dma_ch_run, &s->ch[i]);
+        s->ch[i].timer = qemu_new_timer_ns(vm_clock, soc_dma_ch_run, &s->ch[i]);
     }
 
     soc_dma_reset(&s->soc);