Input: iqs7222 - add support for Azoteq IQS7222D

The vendor has introduced a new variant of silicon which is highly
similar to the existing IQS7222A, but with its independent sliders
essentially replaced with a single-contact trackpad.

Update the common driver to support this new device's register map
and report trackpad events. As with the IQS7222A, the new IQS7222D
can report both raw coordinates as well as gestures.
Signed-off-by: Jeff LaBundy <jeff@labundy.com>
Link: https://lore.kernel.org/r/ZKrpRh6RT6+6KrMQ@nixie71Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/misc/Kconfig

@@ -791,10 +791,10 @@ config INPUT_IQS626A
 	  module will be called iqs626a.
 
 config INPUT_IQS7222
-	tristate "Azoteq IQS7222A/B/C capacitive touch controller"
+	tristate "Azoteq IQS7222A/B/C/D capacitive touch controller"
 	depends on I2C
 	help
-	  Say Y to enable support for the Azoteq IQS7222A/B/C family
+	  Say Y to enable support for the Azoteq IQS7222A/B/C/D family
 	  of capacitive touch controllers.
 
 	  To compile this driver as a module, choose M here: the