stm32mp1: update package information in device tree

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index f5a7630..6f9c201 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1488,6 +1488,7 @@
 	select MISC
 	select OF_CONTROL
 	select OF_LIBFDT
+	select OF_SYSTEM_SETUP
 	select PINCTRL
 	select REGMAP
 	select SUPPORT_SPL