treewide: Migrate CONFIG_LAST_STAGE_INIT to Kconfig

Migrate the CONFIG_LAST_STAGE_INIT option to Kconfig.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
diff --git a/configs/controlcenterd_36BIT_SDCARD_defconfig b/configs/controlcenterd_36BIT_SDCARD_defconfig
index 01a64e2..36c41d2 100644
--- a/configs/controlcenterd_36BIT_SDCARD_defconfig
+++ b/configs/controlcenterd_36BIT_SDCARD_defconfig
@@ -15,6 +15,7 @@
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_BOARD_EARLY_INIT_F=y
 CONFIG_BOARD_EARLY_INIT_R=y
+CONFIG_LAST_STAGE_INIT=y
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_REGINFO=y
 CONFIG_CMD_EEPROM=y