Add support for STM32F42x/STM32F43x rev. 5/B (#15407)

* stm32_common: Add support for STM32F42x/STM32F43x rev. 5/B

According to ST, both 5 and B share the same REV_ID.

Signed-off-by: Alexey Rogachevskiy <sfalexrog@gmail.com>

* stm32_common: Change comment to match code, change enum names to match revisions

platforms/nuttx/src/px4/stm/stm32_common/version/board_mcu_version.c

@@ -48,8 +48,10 @@ enum MCU_REV {
 	MCU_REV_STM32F4_REV_Y = 0x1003,
 	MCU_REV_STM32F4_REV_1 = 0x1007,
 	MCU_REV_STM32F4_REV_3 = 0x2001,
-	MCU_REV_STM32F7_REV_X = MCU_REV_STM32F4_REV_3,
+	MCU_REV_STM32F4_REV_5 = 0x2003,
-	MCU_REV_STM32F7_REV_V = 0x2003
+	MCU_REV_STM32F4_REV_B = MCU_REV_STM32F4_REV_5,
+	MCU_REV_STM32H7_REV_X = MCU_REV_STM32F4_REV_3,
+	MCU_REV_STM32H7_REV_V = 0x2003
 };
 
 /* Define any issues with the Silicon as lines separated by \n
@@ -151,8 +153,10 @@ int board_mcu_version(char *rev, const char **revstr, const char **errata)
 		chip_errata = NULL;
 		break;
 
-	case MCU_REV_STM32F7_REV_V:
+	case MCU_REV_STM32F4_REV_5:
-		*rev = 'V';
+		// MCU_REV_STM32F4_REV_B shares the same REV_ID
+		// MCU_REV_STM32H7_REV_V shares the same REV_ID
+		*rev = chip_version == STM32H74xx_75xx ? 'V' : '5';
 		chip_errata = NULL;
 		break;