ASoC: Intel: Skylake: Update pipe_config_idx before filling BE params

Without updating the index before BE copier config is filled with
hardware parameters, outdated parameters are used instead.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Tested-by: Lukasz Majczak <lma@semihlaf.com>
Link: https://lore.kernel.org/r/20221205085330.857665-2-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>