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/mvebu_db_armada8k_defconfig b/configs/mvebu_db_armada8k_defconfig
index 7f36eda..7f4ee05 100644
--- a/configs/mvebu_db_armada8k_defconfig
+++ b/configs/mvebu_db_armada8k_defconfig
@@ -7,6 +7,7 @@
CONFIG_DEBUG_UART=y
CONFIG_AHCI=y
# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_ENV_IS_IN_SPI_FLASH=y
CONFIG_SYS_CONSOLE_INFO_QUIET=y
# CONFIG_DISPLAY_CPUINFO is not set
# CONFIG_DISPLAY_BOARDINFO is not set