[nrf fromtree] drivers: spi: spi_nrfx_spi: remove multithreading dependency#2907

nordicjm merged 2 commits intonrfconnect:mainnrfconnect/sdk-zephyr:mainfrom

nordic-mik7:dev/spi_single_threadnordic-mik7/sdk-zephyr:dev/spi_single_threadCopy head branch name to clipboard