Add i.MX8MQ EVK support

Add imx8mqevk-viv machine template for i.MX8MQ EVK which uses the
default Vivante driver configuration in meta-freescale with the
new community linux-fslc-imx kernel.  The following additional changes
have been made to support this:
- A linux-fslc-imx bbappend has been added to pull in the AGL kernel
  configuration, and a imx8mq-evkb config fragment has been added to
  enable the required Wifi driver for the updated EVKB board.
- Stale qtbase and weston-init bbappends/patches have been removed
  from meta-agl-bsp/meta-freescale-layer.
- The meta-agl-profile-graphical Weston 8.0.0 bbappend has been
  renamed to 8.0.% so the wildcard will apply it to meta-freescale's
  weston_8.0.0.imx recipe.

Known issues:
- The required PipeWire configuration for the onboard audio needs
  further investigation.

Bug-AGL: SPEC-3258

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: I4ea5437ef0ea8bedb9dd2157f2822ff25ee56cff