FreeBSD does not have sys/asm.h -- for what is this include needed on linux?

Reviewers: #freebsd, mardelle

Differential Revision: https://phabricator.kde.org/D6929

.arcconfig

+{
+    "project.name" : "Kdenlive",
+    "phabricator.uri" : "https://phabricator.kde.org/"
+}

src/lib/external/media_ctrl/mediactrl.c

@@ -24,7 +24,9 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/time.h>
+#if defined(Q_OS_LINUX)
 #include <asm/types.h>
+#endif
 #include <fcntl.h>
 #include <unistd.h>
 #include <stdint.h>