ARM: dts: stm32: remove "@" and "_" from stm32f4 pinmux groups

Replace all "@" and "_" by "-" in pinmux groups for stm32f4 family.
This avoid errors when using yaml to check the bindings.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32f4-pinctrl.dtsi

@@ -163,7 +163,7 @@ gpiok: gpio@40022800 {
 				st,bank-name = "GPIOK";
 			};
 
-			usart1_pins_a: usart1@0 {
+			usart1_pins_a: usart1-0 {
 				pins1 {
 					pinmux = <STM32_PINMUX('A', 9, AF7)>; /* USART1_TX */
 					bias-disable;
@@ -176,7 +176,7 @@ pins2 {
 				};
 			};
 
-			usart3_pins_a: usart3@0 {
+			usart3_pins_a: usart3-0 {
 				pins1 {
 					pinmux = <STM32_PINMUX('B', 10, AF7)>; /* USART3_TX */
 					bias-disable;
@@ -189,7 +189,7 @@ pins2 {
 				};
 			};
 
-			usbotg_fs_pins_a: usbotg_fs@0 {
+			usbotg_fs_pins_a: usbotg-fs-0 {
 				pins {
 					pinmux = <STM32_PINMUX('A', 10, AF10)>, /* OTG_FS_ID */
 						 <STM32_PINMUX('A', 11, AF10)>, /* OTG_FS_DM */
@@ -200,7 +200,7 @@ pins {
 				};
 			};
 
-			usbotg_fs_pins_b: usbotg_fs@1 {
+			usbotg_fs_pins_b: usbotg-fs-1 {
 				pins {
 					pinmux = <STM32_PINMUX('B', 12, AF12)>, /* OTG_HS_ID */
 						 <STM32_PINMUX('B', 14, AF12)>, /* OTG_HS_DM */
@@ -211,7 +211,7 @@ pins {
 				};
 			};
 
-			usbotg_hs_pins_a: usbotg_hs@0 {
+			usbotg_hs_pins_a: usbotg-hs-0 {
 				pins {
 					pinmux = <STM32_PINMUX('H', 4, AF10)>, /* OTG_HS_ULPI_NXT*/
 						 <STM32_PINMUX('I', 11, AF10)>, /* OTG_HS_ULPI_DIR */
@@ -231,7 +231,7 @@ pins {
 				};
 			};
 
-			ethernet_mii: mii@0 {
+			ethernet_mii: mii-0 {
 				pins {
 					pinmux = <STM32_PINMUX('G', 13, AF11)>, /* ETH_MII_TXD0_ETH_RMII_TXD0 */
 						 <STM32_PINMUX('G', 14, AF11)>, /* ETH_MII_TXD1_ETH_RMII_TXD1 */
@@ -251,13 +251,13 @@ pins {
 				};
 			};
 
-			adc3_in8_pin: adc@200 {
+			adc3_in8_pin: adc-200 {
 				pins {
 					pinmux = <STM32_PINMUX('F', 10, ANALOG)>;
 				};
 			};
 
-			pwm1_pins: pwm@1 {
+			pwm1_pins: pwm-1 {
 				pins {
 					pinmux = <STM32_PINMUX('A', 8, AF1)>, /* TIM1_CH1 */
 						 <STM32_PINMUX('B', 13, AF1)>, /* TIM1_CH1N */
@@ -265,14 +265,14 @@ pins {
 				};
 			};
 
-			pwm3_pins: pwm@3 {
+			pwm3_pins: pwm-3 {
 				pins {
 					pinmux = <STM32_PINMUX('B', 4, AF2)>, /* TIM3_CH1 */
 						 <STM32_PINMUX('B', 5, AF2)>; /* TIM3_CH2 */
 				};
 			};
 
-			i2c1_pins: i2c1@0 {
+			i2c1_pins: i2c1-0 {
 				pins {
 					pinmux = <STM32_PINMUX('B', 9, AF4)>, /* I2C1_SDA */
 						 <STM32_PINMUX('B', 6, AF4)>; /* I2C1_SCL */
@@ -282,7 +282,7 @@ pins {
 				};
 			};
 
-			ltdc_pins: ltdc@0 {
+			ltdc_pins: ltdc-0 {
 				pins {
 					pinmux = <STM32_PINMUX('I', 12, AF14)>, /* LCD_HSYNC */
 						 <STM32_PINMUX('I', 13, AF14)>, /* LCD_VSYNC */
@@ -316,7 +316,7 @@ pins {
 				};
 			};
 
-			dcmi_pins: dcmi@0 {
+			dcmi_pins: dcmi-0 {
 				pins {
 					pinmux = <STM32_PINMUX('A', 4, AF13)>, /* DCMI_HSYNC */
 						 <STM32_PINMUX('B', 7, AF13)>, /* DCMI_VSYNC */
@@ -339,7 +339,7 @@ pins {
 				};
 			};
 
-			sdio_pins: sdio_pins@0 {
+			sdio_pins: sdio-pins-0 {
 				pins {
 					pinmux = <STM32_PINMUX('C', 8, AF12)>, /* SDIO_D0 */
 						 <STM32_PINMUX('C', 9, AF12)>, /* SDIO_D1 */
@@ -352,7 +352,7 @@ pins {
 				};
 			};
 
-			sdio_pins_od: sdio_pins_od@0 {
+			sdio_pins_od: sdio-pins-od-0 {
 				pins1 {
 					pinmux = <STM32_PINMUX('C', 8, AF12)>, /* SDIO_D0 */
 						 <STM32_PINMUX('C', 9, AF12)>, /* SDIO_D1 */