FQ output data type copied from 3,4 input data type (#4341)

* FQ output data type copied from 3,4 input data type

* style
Co-authored-by: Scott Cyphers <diyessi@users.noreply.github.com>

src/ngraph/op/fused/fake_quantize.cpp

@@ -77,7 +77,18 @@ void op::FakeQuantize::validate_and_infer_types()
             NODE_VALIDATION_CHECK(this, false, "Unsupported auto broadcast specification");
         }
     }
-    set_output_type(0, get_input_element_type(0), get_input_partial_shape(0));
+
+    element::Type result_et;
+    NODE_VALIDATION_CHECK(
+        this,
+        element::Type::merge(result_et, get_input_element_type(3), get_input_element_type(4)),
+        "Arguments do not have the same element type (arg3 element type: ",
+        get_input_element_type(3),
+        ", arg4 element type: ",
+        get_input_element_type(4),
+        ").");
+
+    set_output_type(0, result_et, get_input_partial_shape(0));
 }
 
 NodeVector op::FakeQuantize::decompose_op() const