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/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 13e19ba..642936b 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -25,6 +25,7 @@
 
 config TARGET_GURNARD
 	bool "Support gurnard"
+	select BOARD_LATE_INIT
 	select CPU_ARM926EJS
 	select DM
 	select DM_SERIAL
@@ -96,6 +97,7 @@
 
 config TARGET_SAMA5D3XEK
 	bool "SAMA5D3X-EK board"
+	select BOARD_LATE_INIT
 	select CPU_V7
 	select SUPPORT_SPL