[PATCH v2] hw/display/edid: Add missing 'qdev-properties.h' header

["Philippe Mathieu-Daudé" <f4bug@amsat.org>]

When trying to consume the DEFINE_EDID_PROPERTIES() macro
by including "hw/display/edid.h", we get this build failure:

  include/hw/display/edid.h:24:5: error: implicit declaration of
  function ‘DEFINE_PROP_UINT32’ [-Werror=implicit-function-declaration]
     24 |     DEFINE_PROP_UINT32("xres", _state, _edid_info.prefx, 0),    \
        |     ^~~~~~~~~~~~~~~~~~

Headers should be self-contained, and one shouldn't have to
dig to find the missing headers.
In this case "hw/qdev-properties.h" is missing. Add it.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
Since v1: reworded description (rth)

Supersedes: <20200504082003.16298-1-f4bug@amsat.org>
---
 include/hw/display/edid.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/hw/display/edid.h b/include/hw/display/edid.h
index ff99dc0a05..23371ee82c 100644
--- a/include/hw/display/edid.h
+++ b/include/hw/display/edid.h
@@ -2,6 +2,7 @@
 #define EDID_H
 
 #include "qom/object.h"
+#include "hw/qdev-properties.h"
 
 typedef struct qemu_edid_info {
     const char *vendor; /* http://www.uefi.org/pnp_id_list */
-- 
2.21.3