Convert CONFIG_BOARD_EARLY_INIT_F to Kconfig
This converts the following to Kconfig:
CONFIG_BOARD_EARLY_INIT_F
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/riotboard_defconfig b/configs/riotboard_defconfig
index 91be32c..d00666b 100644
--- a/configs/riotboard_defconfig
+++ b/configs/riotboard_defconfig
@@ -7,6 +7,7 @@
# CONFIG_CONSOLE_MUX is not set
CONFIG_SYS_CONSOLE_IS_IN_ENV=y
CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE=y
+CONFIG_BOARD_EARLY_INIT_F=y
# CONFIG_CMD_IMLS is not set
# CONFIG_CMD_FLASH is not set
CONFIG_CMD_MMC=y