boards: shields: nucleo shield with stm32f411 plli2s compatible

Completes the PLLi2S configuration for this board based on stm32f411
 with a PLLI2S compatible = "st,stm32f411-plli2s-clock";

Signed-off-by: Francois Ramu <francois.ramu@st.com>

Author: FRASTM

boards/shields/x_nucleo_iks02a1/boards/nucleo_f411re.overlay

@@ -5,9 +5,12 @@
  */
 
 &plli2s {
+	div-m = <8>;
 	mul-n = <192>;
 	div-r = <3>;
-	status = "okay";
+	div-q = <4>;
+	clocks = <&clk_hse>;
+	status = "okay"; /* 48MHz on PLLI2SQ */
 };
 
 &dma2 {