ASoC: Intel: Skylake: Strip manifest for Broxton platform

Broxton firmrware comes with extended manifest so invoke
skl_dsp_strip_extended_manifest() to check and strip

Signed-off-by: Ramesh Babu <ramesh.babu@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>