Squashed commit of the following:
Author: Gregory Nutt <gnutt@nuttx.org>
Update README.
configs/or1k: Should include header file file where exported functin is prototyped.
arch/or1k/src: Eliminate some warnings.
arch/or1k: Complete review
Fix some recently introduced build issues
configs/or1k/nsh: Convert to proper, compressed defconfig file.
Another README update.
Update README
configs/or1k: Updates from initial review.
Update README.
Author: Matt Thompson <matt@extent3d.com>
or1k: Added configurable CPU frequency to Kconfig. Calculate tick timer match period based on configured frequency.
OpenRISC: Enable instruction and data cache
OpenRISC: Initial support.
Matt Thompson