docs(fconf): streamline TB_FW_CONFIG bindings

This change simplifies the documentation for TB_FW_CONFIG by removing
outdated or platform-specific bindings and introducing a clear section
referencing the standardized Chain of Trust (CoT) bindings.

Change-Id: I3f3f96ed333a57153bde929fa35863655c30e8ed
Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
1 file changed