ARM: dts: stm32: add i2c2/i2c5 sleep pinctrl on stm32mp157c-ev1

Add the sleep state pinctrl entry for the i2c2 and i2c5 nodes
of the stm32mp157c-ev1 board.
Signed-off-by: Alain Volmat <alain.volmat@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32mp157c-ev1.dts

@@ -174,8 +174,9 @@ nand@0 {
 };
 
 &i2c2 {
-	pinctrl-names = "default";
+	pinctrl-names = "default", "sleep";
 	pinctrl-0 = <&i2c2_pins_a>;
+	pinctrl-1 = <&i2c2_pins_sleep_a>;
 	i2c-scl-rising-time-ns = <185>;
 	i2c-scl-falling-time-ns = <20>;
 	status = "okay";
@@ -227,8 +228,9 @@ joystick_pins: joystick {
 };
 
 &i2c5 {
-	pinctrl-names = "default";
+	pinctrl-names = "default", "sleep";
 	pinctrl-0 = <&i2c5_pins_a>;
+	pinctrl-1 = <&i2c5_pins_sleep_a>;
 	i2c-scl-rising-time-ns = <185>;
 	i2c-scl-falling-time-ns = <20>;
 	status = "okay";