linux-fslc-imx: introduce 5.4.y kernel with NXP patches
Introduce new kernel recipe, which incorporates all patches from
original NXP release 5.4.3-1.0.0 and latest patch level from stable
5.4.y kernel tree from korg.
This kernel recipe is a consolidation of modifications from upstream and
NXP and is meant to be supported by Community with further stable
patchlevel updates, individual patches which pending in upstream to be
included in the stable, and also to receive updates from NXP internal source
tree from the [lf-5.4.y] branch, which corresponds to release 5.4.3-1.0.0.
