add new machine type imx6slevk, remote both imx6solosabresd and imx6solosabreauto
Merge branch 'master' into imx6

Conflicts:
	imx6slevk/conf/bblayers.conf
	imx6slevk/conf/local.conf
	imx6slevk/conf/local.conf.sample
	imx6slevk/conf/templateconf.cfg