There are already Kconfig options for SPI flash drivers, but we
have not moved them from config.h to defconfig files. This commit
does this in a batch.
CONFIG_ARM=y
CONFIG_TARGET_AM335X_EVM=y
CONFIG_NOR=y
CONFIG_NOR_BOOT=y
# CONFIG_CMD_IMLS is not set
CONFIG_CMD_GPIO=y
# CONFIG_CMD_SETEXPR is not set
CONFIG_SPI_FLASH=y
CONFIG_SPI_FLASH_WINBOND=y
CONFIG_SYS_NS16550=y