Commits
Merge branch '2019-08-24-master-imports' - Migrate SYS_SPI_U_BOOT_OFFS, SYS_NAND_USE_FLASH_BBT and ARCH_CPU_INIT to Kconfig
Merge branch '2019-08-24-master-imports' - Migrate SYS_SPI_U_BOOT_OFFS, SYS_NAND_USE_FLASH_BBT and ARCH_CPU_INIT to Kconfig