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/T1042D4RDB_SECURE_BOOT_defconfig b/configs/T1042D4RDB_SECURE_BOOT_defconfig
index 4318b96..32ddfc9 100644
--- a/configs/T1042D4RDB_SECURE_BOOT_defconfig
+++ b/configs/T1042D4RDB_SECURE_BOOT_defconfig
@@ -12,6 +12,7 @@
 CONFIG_SILENT_CONSOLE=y
 # CONFIG_CONSOLE_MUX is not set
 CONFIG_SYS_CONSOLE_IS_IN_ENV=y
+CONFIG_BOARD_EARLY_INIT_F=y
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_GREPENV=y
 CONFIG_CMD_MMC=y