drivers: pinmux: stm32l4: Add extra pins for I2C1

Add I2C1 SDA/SCL configuration on pins PA9 and PA10, as they are
currently only available on other pins.

Signed-off-by: Aurelien Jarno <[email protected]>

Author: aurel32

drivers/pinmux/stm32/pinmux_stm32l4x.h

@@ -70,9 +70,13 @@
 	 STM32_OSPEEDR_VERY_HIGH_SPEED)
 #define STM32L4X_PINMUX_FUNC_PA7_ADC12_IN12 STM32_MODER_ANALOG_MODE
 
+#define STM32L4X_PINMUX_FUNC_PA9_I2C1_SCL                                      \
+	(STM32_PINMUX_ALT_FUNC_4 | STM32_OPENDRAIN_PULLUP)
 #define STM32L4X_PINMUX_FUNC_PA9_USART1_TX                                     \
 	(STM32_PINMUX_ALT_FUNC_7 | STM32_PUSHPULL_PULLUP)
 
+#define STM32L4X_PINMUX_FUNC_PA10_I2C1_SDA                                     \
+	(STM32_PINMUX_ALT_FUNC_4 | STM32_OPENDRAIN_PULLUP)
 #define STM32L4X_PINMUX_FUNC_PA10_USART1_RX                                    \
 	(STM32_PINMUX_ALT_FUNC_7 | STM32_PUPDR_NO_PULL)
 #define STM32L4X_PINMUX_FUNC_PA10_OTG_FS_ID                                    \