ASoC: wcd-mbhc-v2: remove unnecessary module_init/exit functions

ASoC: wcd-mbhc-v2: remove unnecessary module_init/exit functions

The wcd-mbhc-v2 driver has unnecessary empty module_init and
module_exit functions. Remove them. Note that if a module_init function
exists, a module_exit function must also exist; otherwise, the module
cannot be unloaded.

Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://patch.msgid.link/20260131020111.46108-1-enelsonmoore@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>