media-ctl: fix build with old kernel headers

Add a patch to fix the recurrent media-ctl build problems with
toolchains based on relatively old (< 2.6.39) kernel headers.

Finally fixes:

  http://autobuild.buildroot.org/results/54a/54afc80d4b58a4064a49226bcd4a28f32e3cf814/build-end.log



Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Tested-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>