OMAP history

This file contains documentation for running mainline kernel on omaps.

KERNEL	NEW DEPENDENCIES
v4.3+	Update is needed for custom .config files to make sure CONFIG_REGULATOR_PBIAS is enabled for MMC1 to work properly.
v4.18+	Update is needed for custom .config files to make sure CONFIG_MMC_SDHCI_OMAP is enabled for all MMC instances to work in DRA7 and K2G based boards.