HID: multitouch: support PixArt optical touch screen

This patch modifies hid-multitouch driver for supporting PixArt optical touch
screen.  Because of the device does not have to set initial report, we apply
"HID_QUIRK_NO_INIT_REPORTS" quirk and add the device into hid_blacklist[]

Signed-off-by: Aaron Tian <aaron_tian@pixart.com.tw>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index ee14f78..5d6eb4e 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -349,6 +349,7 @@
 	  - Lumio CrystalTouch panels
 	  - MosArt dual-touch panels
 	  - PenMount dual touch panels
+	  - PixArt optical touch screen
 	  - Pixcir dual touch panels
 	  - Quanta panels
 	  - eGalax dual-touch panels, including the Joojoo and Wetab tablets