drivers: dai: intel: ssp: fix LOG_ERR level / false positive

There's no way this log level was intentional: this line is just the
title / prefix of a multi-line section with mostly LOG_INF statements.

Fixes commit 6423bc3b ("drivers: dai: intel: ssp: Improve logging
output") which was very large hence error-prone.

Fixes SOF bug https://github.com/thesofproject/sof/issues/9026



Signed-off-by: Marc Herbert <marc.herbert@intel.com>