HID: google: modify HID device groups of eel

If HID_GROUP of eel is set to HID_GROUP_GENERIC, Whiskers Tablet Mode
Switch of eel hammer will not be detected by system because the
hid-vivaldi driver probes the device. When it is set to
HID_GROUP_VIVALDI, system will detect Whiskers Tablet Mode Switch
successfully and also support the vivaldi keyboard layout.

Tested-by: "Sean O'Brien" <[e-mail]>
Acked-by: Jiri Kosina <[e-mail]>
Signed-off-by: Zhengqiao Xia <[e-mail]>
[[e-mail]: Expand on commit text]
Signed-off-by: Stephen Boyd <[e-mail]>
Tested-by: Stephen Boyd <[e-mail]> # coachz, wormdingler
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/hid/hid-google-hammer.c

···
 static const struct hid_device_id hammer_devices[] = {
 	{ HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
 		     USB_VENDOR_ID_GOOGLE, USB_DEVICE_ID_GOOGLE_DON) },
-	{ HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
+	{ HID_DEVICE(BUS_USB, HID_GROUP_VIVALDI,
 		     USB_VENDOR_ID_GOOGLE, USB_DEVICE_ID_GOOGLE_EEL) },
 	{ HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
 		     USB_VENDOR_ID_GOOGLE, USB_DEVICE_ID_GOOGLE_HAMMER) },