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_defconfig b/configs/mx28evk_defconfig
index 3c8ea76..d7f0706 100644
--- a/configs/mx28evk_defconfig
+++ b/configs/mx28evk_defconfig
@@ -6,3 +6,4 @@
# CONFIG_CMD_FLASH is not set
CONFIG_CMD_GPIO=y
CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_SST=y