Fix template for s4 and adapt kernel recipe

Fix template for s4 and adapt kernel recipe

The template needs meta-python present and the
kernel recipe does try to install a firmware file
that is not packaged. Remove that.

Bug-AGL: SPEC-5101
Change-Id: I3fdb860df04ee90e3e3b30875ea4f9494b15dbf0
Signed-off-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/29744
Tested-by: Jenkins Job builder account
ci-image-boot-test: Jenkins Job builder account
ci-image-build: Jenkins Job builder account