input: R3GD20: Add R3GD20 gyroscope for HTC

HTC kernel version: evitaul-jb-crc-3.4.10-ec474a3

Change-Id: I94ff18fb64b2d106ce4a80e19ef898e9d1f9b265
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 00b376c..7061165 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -68,3 +68,4 @@
 obj-$(CONFIG_SENSORS_PANASONIC_GYRO)	+= ewtzmu2.o
 obj-$(CONFIG_SENSORS_BMA250)		+= bma250.o
 obj-$(CONFIG_INPUT_CAPELLA_CM3629)	+= cm3629.o
+obj-$(CONFIG_SENSORS_R3GD20)		+= r3gd20.o