libcamera: device_enumerator_udev: Include missing header

The makedev() macro is defined in sys/sysmacros.h, include the header
explicitly.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

src/libcamera/device_enumerator_udev.cpp

@@ -11,6 +11,7 @@
 #include <libudev.h>
 #include <string.h>
 #include <sys/ioctl.h>
+#include <sys/sysmacros.h>
 #include <unistd.h>
 
 #include <libcamera/event_notifier.h>