lenovo/x60: Support digitizer on X60t and X201t.

Change-Id: I5b0399a8edca3b73aa7d515d2c446c31b3239fa5
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/5239
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/drivers/Makefile.inc b/src/drivers/Makefile.inc
index 66fe7b8..cb26643 100644
--- a/src/drivers/Makefile.inc
+++ b/src/drivers/Makefile.inc
@@ -23,6 +23,7 @@
 subdirs-y += generic
 subdirs-y += i2c
 subdirs-y += intel
+subdirs-y += lenovo
 subdirs-y += maxim
 subdirs-y += net
 subdirs-y += parade