Build FTS touchscreen driver

Disable the unused Synaptics touchscreen target.

Bug: 144444533
Test: Build and test touchscreen @ Columbia
Change-Id: I8b213010266d1286b137a17872bba17ecc2b8bdc
diff --git a/debian/defconfig b/debian/defconfig
index 9702f62..8f7e892 100644
--- a/debian/defconfig
+++ b/debian/defconfig
@@ -48,6 +48,8 @@
 CONFIG_USB_F_ACM=y
 CONFIG_USB_GADGETFS=y
 CONFIG_GOOGLE_APEX_POWER=n
+CONFIG_TOUCHSCREEN_SYNAPTICS_DSX_I2C=n
+CONFIG_TOUCHSCREEN_FTS=y
 
 CONFIG_USB_G_HID=y
 CONFIG_USB_SERIAL=y