Revert "workqueues: Introduce new flag WQ_POWER_EFFICIENT for power oriented workqueues"

This reverts commit a857aeea4d216670814013c3f33bd3a1d96319d3.
Revert "workqueue: Add system wide power_efficient workqueues"

This reverts commit 9e7f55700407a7884349caa88049f37d8011e6b7.
Revert "block: queue work on power efficient wq"

This reverts commit f04eea2eda97cf3cf798a33afad6290da685cc20.
Revert "PHYLIB: queue work on system_power_efficient_wq"

This reverts commit b5717f8031e9847de2ff27736e829191ddf92509.
Revert "ASoC: pcm: Use the power efficient workqueue for delayed powerdown"

This reverts commit 27aabac48b64b095d8ed9cd2ec0564e1d12ccd64.
Revert "regulator: core: Use the power efficient workqueue for delayed powerdown"

This reverts commit a5e98d1d30dbbb532c261c93588967dda94e2e7b.
Revert "ASoC: jack: Use power efficient workqueue"

This reverts commit 761e0a064c3a9288aeb9ea5b3e33d1c2dc002fb4.