broadcom/common: Make v3d_device_info.h usable for C++

We need it for our pps ds.

Signed-off-by: Christian Gmeiner <cgmeiner@igalia.com>
Reviewed-by: Maíra Canal <mcanal@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32277>

src/broadcom/common/v3d_device_info.h

@@ -27,6 +27,10 @@
 #include <stdbool.h>
 #include <stdint.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * Struct for tracking features of the V3D chip across driver and compiler.
  */
@@ -93,4 +97,8 @@ v3d_device_has_unpack_max0(const struct v3d_device_info *devinfo)
                  (devinfo->rev == 6 && devinfo->compat_rev >= 4)));
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif