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/P1010RDB-PA_NOR_SECBOOT_defconfig b/configs/P1010RDB-PA_NOR_SECBOOT_defconfig
index 9e99739..7caf3dd 100644
--- a/configs/P1010RDB-PA_NOR_SECBOOT_defconfig
+++ b/configs/P1010RDB-PA_NOR_SECBOOT_defconfig
@@ -9,6 +9,7 @@
 CONFIG_OF_STDOUT_VIA_ALIAS=y
 CONFIG_BOOTDELAY=10
 CONFIG_SYS_CONSOLE_IS_IN_ENV=y
+CONFIG_BOARD_EARLY_INIT_F=y
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_SF=y