atf-poplar_git: Add a Arm Trusted Firmware recipe for Poplar.
atf-poplar_git: Add a Arm Trusted Firmware recipe for Poplar.

Signed-off-by: Peter Griffin <82f81e62be2bf153f8e7977fe8d5e19723573a1d@linaro.org>

fboudra/meta-96boards,kraj/meta-96boards,96boards/meta-96boards,mrchapp/meta-96boards,kraj/meta-96boards