(4)If a deed of trust grants a power of sale to the public trustee but contains no provision on the manner in which the power of sale is to be exercised, the deed of trust shall not be void or voidable, and the holder of the evidence of debt may foreclose the deed of trust in accordance with the provisions of this article on the foreclosure of deeds of trust through the office of the public trustee or in the manner of a mortgage through the courts.