ARM: dts: stm32: add stm32f7 SDIO sleep pins

Add SDIO sleep pin definitions that place the pins in analog mode to
save power.

Signed-off-by: Ben Wolsieffer <ben.wolsieffer@hefring.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

Author: lopsided98

arch/arm/boot/dts/st/stm32f7-pinctrl.dtsi

@@ -263,6 +263,17 @@
 				};
 			};
 
+			sdio_pins_sleep_a: sdio-pins-sleep-a-0 {
+				pins {
+					pinmux = <STM32_PINMUX('C', 8, ANALOG)>, /* SDMMC1 D0 */
+						 <STM32_PINMUX('C', 9, ANALOG)>, /* SDMMC1 D1 */
+						 <STM32_PINMUX('C', 10, ANALOG)>, /* SDMMC1 D2 */
+						 <STM32_PINMUX('C', 11, ANALOG)>, /* SDMMC1 D3 */
+						 <STM32_PINMUX('C', 12, ANALOG)>, /* SDMMC1 CLK */
+						 <STM32_PINMUX('D', 2, ANALOG)>; /* SDMMC1 CMD */
+				};
+			};
+
 			sdio_pins_b: sdio-pins-b-0 {
 				pins {
 					pinmux = <STM32_PINMUX('G', 9, AF11)>, /* SDMMC2 D0 */
@@ -294,6 +305,17 @@
 				};
 			};
 
+			sdio_pins_sleep_b: sdio-pins-sleep-b-0 {
+				pins {
+					pinmux = <STM32_PINMUX('G', 9, ANALOG)>, /* SDMMC2 D0 */
+						 <STM32_PINMUX('G', 10, ANALOG)>, /* SDMMC2 D1 */
+						 <STM32_PINMUX('B', 3, ANALOG)>, /* SDMMC2 D2 */
+						 <STM32_PINMUX('B', 4, ANALOG)>, /* SDMMC2 D3 */
+						 <STM32_PINMUX('D', 6, ANALOG)>, /* SDMMC2 CLK */
+						 <STM32_PINMUX('D', 7, ANALOG)>; /* SDMMC2 CMD */
+				};
+			};
+
 			can1_pins_a: can1-0 {
 				pins1 {
 					pinmux = <STM32_PINMUX('A', 12, AF9)>; /* CAN1_TX */