meta-agl-bsp: imx6: Add new defconfig for the linux-boundary kernel

meta-agl-bsp: imx6: Add new defconfig for the linux-boundary kernel

The default configuration for the linux-boundary kernel uses AppArmor,
but we want to use Smack.

* Switch from using AppArmor to Smack
* Enable CONFIG_HID_MULTITOUCH

Bug-AGL: SPEC-905

Change-Id: Idfcad0ea4c242c30df97407a31661e02df710b2e
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/11311
Reviewed-by: Leon Anavi <leon.anavi@konsulko.com>
Reviewed-by: Thomas Rini <trini@konsulko.com>
Reviewed-by: Matt Ranostay <matt.ranostay@konsulko.com>
Reviewed-by: Matt Porter <mporter@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>