Remove non-functional vestiges of OTGHS in FS mode (including OTGFS2); try to convert the stm32f429i-disco configuration to use OTGHS instead of OTFHS in FS mode (OTGFS2).  But I don't have the boards and can't test

Repartition some message queue logic: sched/mqueue should have all mqueue knowledge; fs/mqueue should deal only with inodes

Fix some comments:  Remove button description from GPIO interrupt handlers that derive from the button interrupt handler

Fix a few compile bugs and minor corrections to the mikroe-stm32f4 configuration source.  From Ken Pettit

Rename CONFIG_EXAMPLES_NXCONSOLE to CONFIG_EXAMPLES_NXTERM; rename CONFIG_NXWM_NXCONSOLE to CONFIG_NXWM_NXTERM

SAMA5D4-EK:  Add documentation/support for Rev E. board. Refresh NSH configuration.  Fix some build errors/warnings introduced with recent work with the knsh configuration