Changed config file extension from .cfg into .yaml

tools/oneclick/prestudy/YAML/bf_unit/peripheral.yaml

tools/oneclick/prestudy/YAML/fringe_stop/peripheral.yaml

...oneclick/prestudy/YAML/mms_diag_block_gen/peripheral.yaml

...eclick/prestudy/YAML/mms_diag_data_buffer/peripheral.yaml

...s/oneclick/prestudy/YAML/mms_dp_bsn_align/peripheral.yaml

...s/oneclick/prestudy/YAML/mms_dp_fifo_fill/peripheral.yaml

tools/oneclick/prestudy/YAML/peripheral.py

tools/oneclick/prestudy/YAML/read_yaml.py

tools/oneclick/prestudy/YAML/system.yaml