[U-Boot] mpc85xx, mpc86xx: device tree model

[Prabhakar Kushwaha]

Hi Tom,

I am seeing following type of build warnings for MMC.

+===================== WARNING ======================
+This board does not use CONFIG_DM_MMC. Please update
+the board to use CONFIG_DM_MMC before the v2019.04 release.
+Failure to update by the deadline may result in board removal.
+See doc/driver-model/MIGRATION.txt for more info.

Considering "number" of powerpc platform are not migrated to deice tree. They can not be migrated to CONFIG_DM_MMC withing v2019.04 time-frame (considering rc4 is on 18th march). 
v2019.07 looks feasible for removing all warning which includes CONFIG_DM_USB, CONFIG_DM_SCSI, CONFIG_DM_PCI, CONFIG_DM_SPI_FLASH and CONFIG_DM_MMC.

is there any plan of removing boards which don't have CONFIG_DM_MMC for v2019.04?

--prabhakar (pk)