HID: map telephony usage page

Currently HID code maps usages from telephony page into BTN_0, BTN_1, etc
keys which get interpreted by mousedev and userspace as left/right/middle
button clicks, which is not really helpful.

This change adds mappings for usages that have corresponding input event
definitions, and leaves the rest unmapped. This can be changed when
there are userspace consumers for more telephony usages.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/include/uapi/linux/input.h b/include/uapi/linux/input.h
index b0a8130..2b628c316 100644
--- a/include/uapi/linux/input.h
+++ b/include/uapi/linux/input.h
@@ -702,6 +702,10 @@
 #define KEY_NUMERIC_9		0x209
 #define KEY_NUMERIC_STAR	0x20a
 #define KEY_NUMERIC_POUND	0x20b
+#define KEY_NUMERIC_A		0x20c	/* Phone key A - HUT Telephony 0xb9 */
+#define KEY_NUMERIC_B		0x20d
+#define KEY_NUMERIC_C		0x20e
+#define KEY_NUMERIC_D		0x20f
 
 #define KEY_CAMERA_FOCUS	0x210
 #define KEY_WPS_BUTTON		0x211	/* WiFi Protected Setup key */