Input: atkbd - switch to use scnprintf() to suppress truncation warning

Switch the driver to use scnprintf() to avoid warnings about potential
truncation of "phys" field which we can tolerate.

Reported-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/keyboard/atkbd.c

@@ -1191,8 +1191,8 @@ static void atkbd_set_device_attrs(struct atkbd *atkbd)
 			 "AT %s Set %d keyboard",
 			 atkbd->translated ? "Translated" : "Raw", atkbd->set);
 
-	snprintf(atkbd->phys, sizeof(atkbd->phys),
-		 "%s/input0", atkbd->ps2dev.serio->phys);
+	scnprintf(atkbd->phys, sizeof(atkbd->phys),
+		  "%s/input0", atkbd->ps2dev.serio->phys);
 
 	input_dev->name = atkbd->name;
 	input_dev->phys = atkbd->phys;