frdm_k64f: Select flash/debug scripts based on OpenSDA firmware

Adds a new variable to define which OpenSDA firmware is on the board,
and selects the default flash/debug scripts accordingly.

Sets the default to daplink since the flashing and debugging examples in
the board document were written to use pyocd.

Signed-off-by: Maureen Helm <maureen.helm@nxp.com>
2 files changed