iio: humidity: hdc3020: Add Makefile, Kconfig and MAINTAINERS entry

Something when wrong when applying the original patch and only the
c file made it in.  Here the rest of the changes are applied.

Fixes: c9180b8e39 ("iio: humidity: Add driver for ti HDC302x humidity sensors")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Cc: Li peiyu <579lpy@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>

MAINTAINERS

@@ -22005,6 +22005,14 @@ F:	Documentation/devicetree/bindings/media/i2c/ti,ds90*
 F:	drivers/media/i2c/ds90*
 F:	include/media/i2c/ds90*
 
+TI HDC302X HUMIDITY DRIVER
+M:	Javier Carrasco <javier.carrasco.cruz@gmail.com>
+M:	Li peiyu <579lpy@gmail.com>
+L:	linux-iio@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/iio/humidity/ti,hdc3020.yaml
+F:	drivers/iio/humidity/hdc3020.c
+
 TI ICSSG ETHERNET DRIVER (ICSSG)
 R:	MD Danish Anwar <danishanwar@ti.com>
 R:	Roger Quadros <rogerq@kernel.org>

drivers/iio/humidity/Kconfig

@@ -48,6 +48,18 @@ config HDC2010
 	  To compile this driver as a module, choose M here: the module
 	  will be called hdc2010.
 
+config HDC3020
+	tristate "TI HDC3020 relative humidity and temperature sensor"
+	depends on I2C
+	select CRC8
+	help
+	  Say yes here to build support for the Texas Instruments
+	  HDC3020, HDC3021 and HDC3022 relative humidity and temperature
+	  sensors.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called hdc3020.
+
 config HID_SENSOR_HUMIDITY
 	tristate "HID Environmental humidity sensor"
 	depends on HID_SENSOR_HUB

drivers/iio/humidity/Makefile

@@ -7,6 +7,7 @@ obj-$(CONFIG_AM2315) += am2315.o
 obj-$(CONFIG_DHT11) += dht11.o
 obj-$(CONFIG_HDC100X) += hdc100x.o
 obj-$(CONFIG_HDC2010) += hdc2010.o
+obj-$(CONFIG_HDC3020) += hdc3020.o
 obj-$(CONFIG_HID_SENSOR_HUMIDITY) += hid-sensor-humidity.o
 
 hts221-y := hts221_core.o \