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/microblaze/Kconfig b/arch/microblaze/Kconfig
index 30ea484..80d85e4 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -10,6 +10,7 @@
 
 config TARGET_MICROBLAZE_GENERIC
 	bool "Support microblaze-generic"
+	select BOARD_LATE_INIT
 	select SUPPORT_SPL
 	select OF_CONTROL
 	select DM