HiKey: remove targets aes-perf and sha-perf

aes-perf and sha-perf are replaced by xtest --aes-perf and
xtest --sha-perf, respectively.

Signed-off-by: Sylvain <sylvain.pelissier@gmail.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@linaro.org>
[Update commit message]
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>