Revert "fix mixer gcc class name"
Revert "fix mixer gcc class name"

This reverts commit 718b3206cbc480b607bed771bbe679c2d312fe16.

no - this REPLACEs the mixer module. the same old mixer gadget that
was originally in e now will be replaced by this new epulse/emixer
gadget. thus the "mixer" gadcon name.

rvandegrift/e,FlorentRevest/Enlightenment,rvandegrift/e,tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment,FlorentRevest/Enlightenment,tasn/enlightenment,rvandegrift/e,FlorentRevest/Enlightenment,tasn/enlightenment,tasn/enlightenment