msm: platsmp: Release secondary cores out of reset for copper

Add support to release secondary cores out of reset for
copper target on simulator.

This helps avoid the warning message from showing up on the
console when the secondary cores are brought online as copper
was not in the list of recognized targets.

Signed-off-by: Sathish Ambley <sambley@codeaurora.org>
Change-Id: Ib9d8df35d277535f8a885c0e9e803ecee1e71903