weston: Remove weston@service and rely on the poky provided variant

Also adapt the imx6ull override and the sed command
to set the fbdev backend for weston.

recipes-graphics/wayland/weston-init.bbappend

@@ -45,9 +45,9 @@ pkg_postinst_ontarget:${PN}() {
     fi
 }
 
-do_configure:append_mx6ull() {
-
-    sed -i ${WORKDIR}/weston@.service -e "s|ExecStart=/usr/bin/weston-start.*|ExecStart=/usr/bin/weston-start -v -e -- --backend=fbdev-backend.so --modules=systemd-notify.so $OPTARGS |"
+do_configure:append:mx6ull() {
+    # Append the fbdev backend parameter to weston for Nallino
+    sed -i ${WORKDIR}/weston.service -e "s|ExecStart=.*weston.*|& --backend=fbdev-backend.so|"
 }
 
 do_install:append() {

recipes-graphics/wayland/weston-init/weston@.service

-[Unit]
-Description=Weston Wayland Compositor
-RequiresMountsFor=/run
-Conflicts=plymouth-quit.service
-After=systemd-user-sessions.service plymouth-quit-wait.service
-
-[Service]
-User=%i
-PAMName=login
-EnvironmentFile=-/etc/default/weston
-StandardError=journal
-PermissionsStartOnly=true
-IgnoreSIGPIPE=no
-
-Type=notify
-NotifyAccess=all
-ExecStart=/usr/bin/weston-start -v -e -- --modules=systemd-notify.so $OPTARGS