soundwire: intel: remove intel_init() wrapper

soundwire: intel: remove intel_init() wrapper

We can directly call intel_link_power_up and do power_up+shim_init in
the same function. This simplifies the code with a better symmetry
between power_up and power_down operations.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220919175721.354679-8-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>