package/efl: remove wayland dependency

Wayland support requires DRM support in efl libraries since 1.18 bump,
but this support is not merged yet in Buildroot and waiting for review
[1].

For 2016.11, keep wayland support disabled to avoid build issues.

Fixes:
http://autobuild.buildroot.net/results/162133cbddcca1ea8be660a19771f04296c20fd2

[1] http://patchwork.ozlabs.org/patch/671260/
    http://patchwork.ozlabs.org/patch/671261/



Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>