1. A mortgage is a contract by which specific real property capable of being transferred is hypothecated for the performance of an act without requiring a change in possession, and includes a transfer of an interest in real property, other than a trust, made only to secure the performance of an act.
2. A power of sale under a mortgage of real property is a trust and can be executed only in the manner prescribed by the laws of this state governing the foreclosure of mortgages. Such a power may be conferred by a mortgage upon the mortgagee, or any other person, to be exercised after a breach of the obligation for which the mortgage is a security.