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/lenovo/lenovo.h b/src/drivers/lenovo/lenovo.h
new file mode 100644
index 0000000..4c44119
--- /dev/null
+++ b/src/drivers/lenovo/lenovo.h
@@ -0,0 +1,3 @@
+int drivers_lenovo_is_wacom_present(void);
+void drivers_lenovo_serial_ports_ssdt_generate(const char *scope,
+					       int have_dock_serial);