Convert CONFIG_ENV_IS_IN_SPI_FLASH to Kconfig
This converts the following to Kconfig:
CONFIG_ENV_IS_IN_SPI_FLASH
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/sama5d3xek_spiflash_defconfig b/configs/sama5d3xek_spiflash_defconfig
index 0166cb6..41bf96c 100644
--- a/configs/sama5d3xek_spiflash_defconfig
+++ b/configs/sama5d3xek_spiflash_defconfig
@@ -13,6 +13,7 @@
CONFIG_DEBUG_UART=y
CONFIG_FIT=y
CONFIG_SYS_EXTRA_OPTIONS="SAMA5D3,SYS_USE_SERIALFLASH"
+CONFIG_ENV_IS_IN_SPI_FLASH=y
CONFIG_BOOTDELAY=3
# CONFIG_DISPLAY_BOARDINFO is not set
CONFIG_SPL=y