Input: wacom - remove code duplication

Replaces code to calculate Intuos5 physical dimensions with a call
to an existing function that performs the same task.

Signed-off-by: Jason Gerecke <killertofu@gmail.com>
Reviewed-by: Chris Bagwell <chris@cnpbagwell.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c
index a5d1c60e..9e8fdcf 100644
--- a/drivers/input/tablet/wacom_sys.c
+++ b/drivers/input/tablet/wacom_sys.c
@@ -1171,10 +1171,7 @@
 			features->device_type = BTN_TOOL_FINGER;
 			features->pktlen = WACOM_PKGLEN_BBTOUCH3;
 
-			features->x_phy =
-				(features->x_max * 100) / features->x_resolution;
-			features->y_phy =
-				(features->y_max * 100) / features->y_resolution;
+			wacom_set_phy_from_res(features);
 
 			features->x_max = 4096;
 			features->y_max = 4096;