ARM: dts: stm32: Add missing pinctrl definitions for STM32MP157

Add missing pinctrl definitions for STM32MP157 MPU.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32mp157-pinctrl.dtsi

@@ -293,6 +293,23 @@ pins {
 				};
 			};
 
+			i2c1_pins_b: i2c1-2 {
+				pins {
+					pinmux = <STM32_PINMUX('F', 14, AF5)>, /* I2C1_SCL */
+						 <STM32_PINMUX('F', 15, AF5)>; /* I2C1_SDA */
+					bias-disable;
+					drive-open-drain;
+					slew-rate = <0>;
+				};
+			};
+
+			i2c1_pins_sleep_b: i2c1-3 {
+				pins {
+					pinmux = <STM32_PINMUX('F', 14, ANALOG)>, /* I2C1_SCL */
+						 <STM32_PINMUX('F', 15, ANALOG)>; /* I2C1_SDA */
+				};
+			};
+
 			i2c2_pins_a: i2c2-0 {
 				pins {
 					pinmux = <STM32_PINMUX('H', 4, AF4)>, /* I2C2_SCL */
@@ -310,6 +327,21 @@ pins {
 				};
 			};
 
+			i2c2_pins_b1: i2c2-2 {
+				pins {
+					pinmux = <STM32_PINMUX('H', 5, AF4)>; /* I2C2_SDA */
+					bias-disable;
+					drive-open-drain;
+					slew-rate = <0>;
+				};
+			};
+
+			i2c2_pins_sleep_b1: i2c2-3 {
+				pins {
+					pinmux = <STM32_PINMUX('H', 5, ANALOG)>; /* I2C2_SDA */
+				};
+			};
+
 			i2c5_pins_a: i2c5-0 {
 				pins {
 					pinmux = <STM32_PINMUX('A', 11, AF4)>, /* I2C5_SCL */
@@ -769,6 +801,34 @@ pins2 {
 					bias-disable;
 				};
 			};
+
+			uart4_pins_b: uart4-1 {
+				pins1 {
+					pinmux = <STM32_PINMUX('D', 1, AF8)>; /* UART4_TX */
+					bias-disable;
+					drive-push-pull;
+					slew-rate = <0>;
+				};
+				pins2 {
+					pinmux = <STM32_PINMUX('B', 2, AF8)>; /* UART4_RX */
+					bias-disable;
+				};
+			};
+
+			uart7_pins_a: uart7-0 {
+				pins1 {
+					pinmux = <STM32_PINMUX('E', 8, AF7)>; /* UART4_TX */
+					bias-disable;
+					drive-push-pull;
+					slew-rate = <0>;
+				};
+				pins2 {
+					pinmux = <STM32_PINMUX('E', 7, AF7)>, /* UART4_RX */
+						 <STM32_PINMUX('E', 10, AF7)>, /* UART4_CTS */
+						 <STM32_PINMUX('E', 9, AF7)>; /* UART4_RTS */
+					bias-disable;
+				};
+			};
 		};
 
 		pinctrl_z: pin-controller-z@54004000 {
@@ -794,6 +854,21 @@ gpioz: gpio@54004000 {
 				status = "disabled";
 			};
 
+			i2c2_pins_b2: i2c2-0 {
+				pins {
+					pinmux = <STM32_PINMUX('Z', 0, AF3)>; /* I2C2_SCL */
+					bias-disable;
+					drive-open-drain;
+					slew-rate = <0>;
+				};
+			};
+
+			i2c2_pins_sleep_b2: i2c2-1 {
+				pins {
+					pinmux = <STM32_PINMUX('Z', 0, ANALOG)>; /* I2C2_SCL */
+				};
+			};
+
 			i2c4_pins_a: i2c4-0 {
 				pins {
 					pinmux = <STM32_PINMUX('Z', 4, AF6)>, /* I2C4_SCL */