X60: enable Cx power saving modes

Change-Id: Ib03d9aa77050edde2538b80b32158cb3f0610be6
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Reviewed-on: http://review.coreboot.org/331
Tested-by: build bot (Jenkins)
diff --git a/src/mainboard/lenovo/x60/Kconfig b/src/mainboard/lenovo/x60/Kconfig
index 3b39ed8..69f83a8 100644
--- a/src/mainboard/lenovo/x60/Kconfig
+++ b/src/mainboard/lenovo/x60/Kconfig
@@ -11,6 +11,7 @@
 	select SUPERIO_NSC_PC87392
 	select EC_LENOVO_PMH7
 	select EC_LENOVO_H8
+	select DRIVERS_ICS_954309
 	select BOARD_HAS_FADT
 	select HAVE_OPTION_TABLE
 	select HAVE_PIRQ_TABLE