boards: 96b boards: based on stm32f446 or stm32f412 with plli2s compatible

Completes the PLLi2S configuration for those boards based on stm32f4
with a PLLI2S compatible = "st,stm32f411-plli2s-clock";

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

Author: FRASTM

boards/96boards/argonkey/96b_argonkey.dts

@@ -71,7 +71,9 @@
 	div-m = <8>;
 	mul-n = <192>;
 	div-r = <3>;
-	status = "okay";
+	div-q = <4>;
+	clocks = <&clk_hse>;
+	status = "okay"; /* 48MHz on PLLI2SQ */
 };
 
 &rcc {

boards/96boards/stm32_sensor_mez/96b_stm32_sensor_mez.dts

@@ -75,7 +75,9 @@
 	div-m = <8>;
 	mul-n = <192>;
 	div-r = <3>;
-	status = "okay";
+	div-q = <4>;
+	clocks = <&clk_hse>;
+	status = "okay"; /* 48MHz on PLLI2SQ */
 };
 
 &rcc {