mfxwindow_x11: Removed defined HAVE_XCBX11 check in X11 render window.
mfxwindow_x11: Removed defined HAVE_XCBX11 check in X11 render window.

Fixes #23

Signed-off-by: Lim Siew Hoon <e412356d7e67dbdde94e841e5d46937fb9f4e623@intel.com>

rislim/gstreamer-media-SDK,ishmael1985/gstreamer-media-SDK,ph0b/gstreamer-media-SDK,rislim/gstreamer-media-SDK