UPSTREAM: rockchip/dptx: update WHENCE to version 3.1

52ef7302 didn't bump it here.

BUG=chrome-os-partner:55030, chrome-os-partner:56523
TEST=check the DP display

Change-Id: I0b75f26cc91d8f9676ffb77681a9f3afbe49f241
Signed-off-by: Kyle McMartin <kyle@kernel.org>
Reviewed-on: https://chromium-review.googlesource.com/413164
Commit-Ready: Chris Zhong <zyw@rock-chips.com>
Tested-by: Chris Zhong <zyw@rock-chips.com>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
(cherry picked from commit 8e8335d45c870cfd92ed867af5dbe8c11db19190)
Reviewed-on: https://chromium-review.googlesource.com/415111
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Douglas Anderson <dianders@chromium.org>
diff --git a/WHENCE b/WHENCE
index 67bf1c3..7c2fb5c 100644
--- a/WHENCE
+++ b/WHENCE
@@ -2618,6 +2618,6 @@
 Driver: rk3399-dptx - ROCKCHIP rk3399 dptx firmware
 
 File: rockchip/dptx.bin
-Version: 2.9
+Version: 3.1
 
 Licence: Redistributable. See LICENCE.rockchip for details.