meta-agl-bsp: imx6: Update the imx6qsabrelite machine template

meta-agl-bsp: imx6: Update the imx6qsabrelite machine template

* Add include/agl_imx6qsabrelite.inc
* Change the FSL layer from meta-fsl-* to meta-freescale-*
* Rename 50_bblayers.conf.inc to 40_bblayers.conf.inc

Bug-AGL: SPEC-905

Change-Id: I29563fa7bc25240018383fba2b30e2171366282a
Signed-off-by: Mihail Grigorov <michael.grigorov@konsulko.com>
Signed-off-by: Georgi Vlaev <georgi.vlaev@konsulko.com>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/11307
Reviewed-by: Leon Anavi <leon.anavi@konsulko.com>
Reviewed-by: Thomas Rini <trini@konsulko.com>
Reviewed-by: Matt Ranostay <matt.ranostay@konsulko.com>
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-boot-test: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>