lenovo/x200: Enable wacom digitizer support for x200t

This patch is based on commit f2b3cd63
(lenovo/x60: Support digitizer on X60t and X201t)

Tested on Thinkpad X200 Tablet (7450): all pen functionallity
works (i.e. movements, presure sensitivity and buttons)

Change-Id: I9bd18642a6ea4211dc3be065456a507fc0b72561
Signed-off-by: Alex David <opdecirkel@gmail.com>
Reviewed-on: http://review.coreboot.org/10208
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Vladimir Serbinenko <phcoder@gmail.com>
diff --git a/src/mainboard/lenovo/x200/Kconfig b/src/mainboard/lenovo/x200/Kconfig
index 01556b3..7bae12d 100644
--- a/src/mainboard/lenovo/x200/Kconfig
+++ b/src/mainboard/lenovo/x200/Kconfig
@@ -21,6 +21,8 @@
 	select MAINBOARD_HAS_NATIVE_VGA_INIT
 	select MAINBOARD_HAS_NATIVE_VGA_INIT_TEXTMODECFG
 	select INTEL_INT15
+	select SUPERIO_NSC_PC87382
+	select DRIVERS_LENOVO_WACOM
 
 config MAINBOARD_DIR
 	string