Convert CONFIG_MISC_INIT_F to Kconfig

This converts the following to Kconfig:
   CONFIG_MISC_INIT_F

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 5bc90d0..5da8d16 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -24,6 +24,7 @@
 CONFIG_LOG_SYSLOG=y
 CONFIG_LOG_ERROR_RETURN=y
 CONFIG_DISPLAY_BOARDINFO_LATE=y
+CONFIG_MISC_INIT_F=y
 CONFIG_ANDROID_AB=y
 CONFIG_CMD_CPU=y
 CONFIG_CMD_LICENSE=y