Revert "socinfo: workaround for passing the CPU type"

This reverts commit ae6eff7506732ae72ee6001aae011456484ec3a3.
socinfo: Revert to dummy values on unknown SOC id.

Change-Id: Ibc3649ff85bcc8e354b947fd8822a7d4dbe14317
socinfo: Provide correct values for SEMC devices.

Change-Id: Ic2182122e33cbfd163dcbbcac03e7527c9b852a8