The new helper returns index of the matching string in an array.
We are going to use it here.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NKishon Vijay Abraham I <kishon@ti.com>