configure: fix enable_simple_intel_dmabuf_client=auto

When the user does not specify --enable nor
--disable-simple-intel-dmabuf-client, we want to autodetect based on
dependencies. cb512c018e8db66574b4e0d1263c52a05267918c implemented this,
but forgot to actually enable it if the autodetect comes positive.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Daniel Stone <daniels@collabora.com>
1 file changed