druwl: wacom HWID sku3

druwl sku3 equal dru sku7

BUG=b:136798869
TEST=emerge-scarlet chromeos-bsp-scarlet chromeos-config-bsp-scarlet

Change-Id: Id6733a5a4e01274e02d917fb3410a7332b01b04a
Signed-off-by: T.H. Lin  <t.h_lin@quanta.corp-partner.google.com>
Reviewed-on: https://chromium-review.googlesource.com/1694301
Tested-by: TH Lin <t.h_lin@quanta.corp-partner.google.com>
Commit-Ready: TH Lin <t.h_lin@quanta.corp-partner.google.com>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: TH Lin <t.h_lin@quanta.corp-partner.google.com>
Reviewed-by: Philip Chen <philipchen@chromium.org>
(cherry picked from commit 5c338a4fcb5d153be20a55a1f0e63ba29110f90f)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/board-overlays/+/1708497
Reviewed-by: Ren Kuo <ren.kuo@quanta.corp-partner.google.com>
Tested-by: Ren Kuo <ren.kuo@quanta.corp-partner.google.com>
Auto-Submit: Ren Kuo <ren.kuo@quanta.corp-partner.google.com>
diff --git a/overlay-scarlet/chromeos-base/chromeos-bsp-scarlet/files/get_board_specific_wacom_hwid.sh b/overlay-scarlet/chromeos-base/chromeos-bsp-scarlet/files/get_board_specific_wacom_hwid.sh
index c5f6042..e6c2a77 100644
--- a/overlay-scarlet/chromeos-base/chromeos-bsp-scarlet/files/get_board_specific_wacom_hwid.sh
+++ b/overlay-scarlet/chromeos-base/chromeos-bsp-scarlet/files/get_board_specific_wacom_hwid.sh
@@ -31,6 +31,10 @@
     "2")
       echo "sku6"
       ;;
+    # sku3 shares the same panel as sku7.
+    "3")
+      echo "sku7"
+      ;;
     *)
       ## Unknown SKU.
       echo 0000_0000