The imx-uuc source code uses fork(), so it can only be compiled and used
on MMU-capable platforms. This commit adds the necessary Config.in
dependencies to express this.
Fixes:
http://autobuild.buildroot.net/results/41602c20d4e6a833e72b507792a28b8db74a5f53/
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>