Fix out set parameters success return code

str_params_get_str returns length of returned string value
on success, but HAL set parameters should return 0 on success.

This change fixes MSD to primary HAL audio patch creation on
a hikey960 target variant supporting MSD.

Change-Id: Idba8ba7283b0a4c42fa4b69e501cf0e008558c60
1 file changed