Add recipe for Linux kernel 4.19 for Raspberry Pi 4 and keep
4.14 for Raspberry Pi 3. The recipe for 4.19 is backported
from master branch of the upstream of meta-raspberrypi.
Bug-AGL: SPEC-2656
Signed-off-by: Leon Anavi <leon.anavi@konsulko.com>
Change-Id: I93bbc5527383e26862894859bff6e44a6bc17966 Signed-off-by: Leon Anavi <leon.anavi@konsulko.com>