Merge patch series "omap configuration cleanups"

Paul Kocialkowski <paulk@sys-base.io> says:

Here is a bunch of configuration cleanups for OMAP boards, mostly
unifying and moving common configuration from board-specific defconfigs
to Kconfig definitions.

There's also a cleanup of the sniper (LG Optimus Black) defconfig,
prior to migrating it to DM/DT in a future follow-up series.