MMC highlights for 3.9:

Core:
 - Support for packed commands in eMMC 4.5.  (This requires a host
   capability to be turned on.  It increases write throughput by 20%+,
   but may also increase average write latency; more testing needed.)
 - Add DT bindings for capability flags.
 - Add mmc_of_parse() for shared DT parsing between drivers.

Drivers:
 - android-goldfish: New MMC driver for the Android Goldfish emulator.
 - mvsdio: Add DT bindings, pinctrl, use slot-gpio for card detection.
 - omap_hsmmc: Fix boot hangs with RPMB partitions.
 - sdhci-bcm2835: New driver for controller used by Raspberry Pi.
 - sdhci-esdhc-imx: Add 8-bit data, auto CMD23 support, use slot-gpio.
 - sh_mmcif: Add support for eMMC DDR, bundled MMCIF IRQs.
 - tmio_mmc: Add DT bindings, support for vccq regulator.
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