defconfig: msm: Add perf configuration support for sdm670

Create new performance configuration file for sdm670 target.
Copied from sdm845-perf config, removed sdm670 support in
sdm845-perf config.

Change-Id: I21a8bd72613e793f9bb1351814d178adfd779aca
Signed-off-by: Lingutla Chandrasekhar <clingutla@codeaurora.org>
2 files changed