acpi: move declarations from pc.h to acpi.h

Functions defined in acpi/ should be declared in
acpi.h

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/arch_init.c b/arch_init.c
index 769ce77..fba0889 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -49,6 +49,7 @@
 #include "qmp-commands.h"
 #include "trace.h"
 #include "exec/cpu-all.h"
+#include "hw/acpi/acpi.h"
 
 #ifdef DEBUG_ARCH_INIT
 #define DPRINTF(fmt, ...) \