Kconfig: Migrate BOARD_LATE_INIT to a select

This option should not really be user selectable.  Note that on PowerPC
we currently only need BOARD_LATE_INIT when CHAIN_OF_TRUST is enabled so be
conditional on that.

Signed-off-by: Tom Rini <trini@konsulko.com>
Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com> (for UniPhier)
diff --git a/arch/arm/cpu/armv7/mx7/Kconfig b/arch/arm/cpu/armv7/mx7/Kconfig
index fb00b8c..8dfb4c9 100644
--- a/arch/arm/cpu/armv7/mx7/Kconfig
+++ b/arch/arm/cpu/armv7/mx7/Kconfig
@@ -18,18 +18,21 @@
 
 config TARGET_MX7DSABRESD
 	bool "mx7dsabresd"
+	select BOARD_LATE_INIT
 	select MX7D
 	select DM
 	select DM_THERMAL
 
 config TARGET_WARP7
 	bool "warp7"
+	select BOARD_LATE_INIT
 	select MX7D
 	select DM
 	select DM_THERMAL
 
 config TARGET_COLIBRI_IMX7
 	bool "Support Colibri iMX7S/iMX7D modules"
+	select BOARD_LATE_INIT
 	select DM
 	select DM_SERIAL
 	select DM_THERMAL