efl: add wayland-packageconfig to defaults if wayland is in distro features

At least meta-fsl-arm supports either x11 or wayland - not both at the same
time - for their gpu blobs. Selecting x11 only does not build wayland-egl and
efl's configuration fails with:

| checking whether to enable Wayland Egl rendering backend... yes
| configure: error: Wayland Egl dependencies not found
| Configure failed. The contents of all config.log files follows to aid debugging

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>