Revert "block: add a flag to identify PM request"

This reverts commit 61d365fd13dcbc530e3ba8369c930d26a335f699.
Revert "block: ioctl support for sanitize in eMMC 4.5"

This reverts commit dcbb67e189d626a9e43b6c7e5e3bb916b152d9c3.
Revert "blkpm: avoid sleep when holding queue lock"

This reverts commit a9650b04bba4e9d6942360711c172789b64ca02f.
Revert "block: add runtime pm helpers"

This reverts commit 4be9ea978708b3649b16112159a0811e8f5232cf.
Revert "block: implement runtime pm strategy"

This reverts commit 9a25a25214417eddc9fa5fd5953919139d37d7da.
Revert "block: do not notify urgent request, when flush with data in flight"

This reverts commit 8e3aaf39fdcff8d1b9ac58d749dffc5ebcbadd3b.