ASoC: Intel: Skylake: Fix not to ignore return value in be hw_params

Return value from skl_tplg_be_update_params() is ignored. But if the
blob is null then the hw_params needs to return error.
This patch fixes the issue by not ignoring return value from
skl_tplg_be_update_params().

Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>