** Tags added: originate-from-1788206 somerville

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  To reduce the Realtek USB cardreader power consumption

Status in HWE Next:
Status in linux package in Ubuntu:
  In Progress
Status in linux-oem package in Ubuntu:

Bug description:
  Realtek USB cardreader consumes more than 1 Watt during long idle if it's not 
suspended. And it's runtime PM functions are available after v4.20.

  To avoid conflicts, have to backport some patches for mmc core.

  Note: Inside () are the previous value (non-patch)
  Sort idle: 7.76W (7.88)
  Long idle: 4.658W (5.79)
  S3: 0.5W (0.5)
  S5: 0.20W (0.208)

  [Regression Potential]
  Low, most commits are for rtsx_usb_{sdmmc,ms} and are all small changes.

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