soundwire: bus: drop unused driver name field

The soundwire driver name field is not currently used by any driver (and
even appears to never have been used) so drop it.

Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20240712140801.24267-3-johan+linaro@kernel.org


Signed-off-by: Vinod Koul <vkoul@kernel.org>