That's a set of prety minor changes and fixes for ARC. Among them: * Improvement in CREG GPIO driver used on ARC dev boards that allow us to re-use the driver for SPI's chip select * Enable SPI-flsh on AXS10x boards which allows to update U-Boot binary that gets loaded by boot-ROM * Fix accommodating always utilized unaligned access by GCC for ARC starting from 8.1.0