sf: Move SPI flash drivers to defconfig
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.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/configs/mx28evk_spi_defconfig b/configs/mx28evk_spi_defconfig
index d1d8ed7..976ebc2 100644
--- a/configs/mx28evk_spi_defconfig
+++ b/configs/mx28evk_spi_defconfig
@@ -6,3 +6,4 @@
# CONFIG_CMD_FLASH is not set
CONFIG_CMD_GPIO=y
CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_SST=y