[U-Boot] [PATCH 00/08]: Config cleanups

Hey all,

As part of the RFC config cleanups I sent a while ago, I've come up with a number of related cleanups that should be done. This series does that. It's mostly OMAP* stuff except for the last one which fixes the case of using config_cmd_default.h and NOT setting CONFIG_SYS_NO_FLASH before then and having to manually undef CONFIG_CMD_(FLASH|IMLS). I can split that up if needed.