Add tune entries for all Arm Cortex-R processors currently supported in
GCC. Also, add the simd feature, which can be used in ARMv7a and
ARMv8a, but currently isn't.
(From OE-Core rev: 67e582379afa9bff8d585b4c7f1bc65a76d088fb)
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>