dt-bindings: mfd: stm32f7: Add binding definition for CAN3

Add binding definition for CAN3 peripheral.
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Link: https://lore.kernel.org/r/20230423172528.1398158-2-dario.binacchi@amarulasolutions.comSigned-off-by: Lee Jones <lee@kernel.org>

include/dt-bindings/mfd/stm32f7-rcc.h

@@ -64,6 +64,7 @@
 #define STM32F7_RCC_APB1_TIM14		8
 #define STM32F7_RCC_APB1_LPTIM1		9
 #define STM32F7_RCC_APB1_WWDG		11
+#define STM32F7_RCC_APB1_CAN3		13
 #define STM32F7_RCC_APB1_SPI2		14
 #define STM32F7_RCC_APB1_SPI3		15
 #define STM32F7_RCC_APB1_SPDIFRX	16