board: ge: common: add config option for RTC and VPD feature

While this code is being used by all GE platforms its useful
to have it behind a config option for hardware bringup of
new platforms.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
diff --git a/board/ge/mx53ppd/Kconfig b/board/ge/mx53ppd/Kconfig
index 6dc3818..bebb2fa 100644
--- a/board/ge/mx53ppd/Kconfig
+++ b/board/ge/mx53ppd/Kconfig
@@ -13,4 +13,6 @@
 config SYS_CONFIG_NAME
 	default "mx53ppd"
 
+source "board/ge/common/Kconfig"
+
 endif