msm8916: Enable QCOM bionic optimizations

Enable QCOM bionic optimizations for 8916.
Define QCOM_NEON_OPTIMIZATION for using QCOM specific
bionic optimizations.

Change-Id: I77cb7380ed2eed42a94cdf8f2ff04e800ff75092
Use memmove from krait for cortex-a53 target

Other functions are still as from cortex-a15 as originally configured.

Change-Id: If69348fc2c52cd04536e67a6aa650743459d75d4