input: atmel_224e: Add Atmel 224e touchscreen support

HTC kernel version: villeu-jb-crc-3.4.10-ae8b65e

Change-Id: I4ba4e21c13c150deb7ad2546b559877c741a99f1
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index bc987a6..cd8e446 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -1009,3 +1009,9 @@
 	  module will be called synaptics_dsx_fw_update.
 
 endif
+
+config TOUCHSCREEN_ATMEL_224E
+	tristate "Atmel i2c touchscreen"
+	depends on I2C
+	help
+	  This enables support for Atmel over I2C based touchscreens.