Use ECWR function, instead of writing raw values to emem, to avoid a lack of syncronisation as it uses a mutex. Signed-off-by: Sean Rhodes <sean@starlabs.systems> Change-Id: I90cfd3e1752fe25493bd72ea6bcab1fd9318d2e3 Reviewed-on: https://review.coreboot.org/c/coreboot/+/62637 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>