MMC core:

 - Fix an error path in the mmc block layer
 - Fix PM domain attachment for the SDIO bus
 - Add support for driver strength selection
 - Increase a delay to let voltage stabilize
 - Add support for disabling write-protect detection
 - Add facility to support re-tuning
 - Re-tune and retry in the recovery path
 - Add reset option for SDIO
 - Consolidations and clean-ups

MMC host:
 - Add Mediatek MMC driver
 - Constify platform_device_id for a couple of hosts
 - Fix modalias to make module auto-loading work for a couple of hosts
 - sdhci: Add support for sdhci-arasan4.9a
 - sdhci: Fix low memory corruption
 - sdhci: Restore behavior while creating OCR mask
 - sdhci: Add a callback to select drive strength
 - sdhci: Fix driver type B and D handling
 - sdhci: Add support for drive strength selection for SPT
 - sdhci: Enable HS400 for some Intel host controllers
 - sdhci: Convert to use the new re-tuning facility
 - sdhci: Various minor fixes and clean-ups
 - dw_mmc: Add support for hi6220
 - dw_mmc: Use core to handle absent write protect line
 - dw_mmc: Add support to switch voltage
 - tmio: Some fixes and modernizations
 - sh_mmcif: Improve clock rate calculation
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