hw: include hw header files with full paths

Done with this script:

cd hw
for i in `find . -name '*.h' | sed 's/^..//'`; do
  echo '\,^#.*include.*["<]'$i'[">], s,'$i',hw/&,'
done | sed -i -f - `find . -type f`

This is so that paths remain valid as files are moved.

Instead, files in hw/dataplane are referenced with the relative path.
We know they are not going to move to include/, and they are the only
include files that are in subdirectories _and_ move.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/hw/ptimer.c b/hw/ptimer.c
index 24af6a2..4bc96c9 100644
--- a/hw/ptimer.c
+++ b/hw/ptimer.c
@@ -5,9 +5,9 @@
  *
  * This code is licensed under the GNU LGPL.
  */
-#include "hw.h"
+#include "hw/hw.h"
 #include "qemu/timer.h"
-#include "ptimer.h"
+#include "hw/ptimer.h"
 #include "qemu/host-utils.h"
 
 struct ptimer_state