Platform: Correct platform log API usage

Deprecate the legacy "LOG_MSG" API in platforms, replaced by SPM or
SP log APIs.

Change-Id: I009c2f64018aa1c171cc15778bafdcdfeb685bd7
Signed-off-by: Shawn Shan <Shawn.Shan@arm.com>
Signed-off-by: Chris Brand <chris.brand@cypress.com>
11 files changed