Revert "regulator: core: Use the power efficient workqueue for delayed powerdown"

This reverts commit 5cb006f4096470a7addb1a3e3a88b1206febc8ae.
Revert "ASoC: pcm: Use the power efficient workqueue for delayed powerdown"

This reverts commit f8981dc5f6bf82d29ca30294333470bf567587a4.
Revert "ASoC: jack: Use power efficient workqueue"

This reverts commit 4322cdb3cbbdd934754d584446d374ac7e4fb376.