The Field Firmware Update (FFU) feature is new for eMMC 5.0 spec
(Jedec: JESD84-B50.pdf)
http://www.jedec.org/standards-documents/technology-focus-areas/flash-memory-ssds-ufs-emmc/e-mmc
An ioctl has been added to provide the new firmware image's file name to the
mmc driver and udev is then
Add Support to Field Firmware Update (FFU) for eMMC v5.0 and up devices.
The code implemented according to JEDEC eMMC spec - JESD84-B50.pdf
http://www.jedec.org/standards-documents/technology-focus-areas/flash-memory-ssds-ufs-emmc/e-mmc
This patch version (V4) provides udev
