force FIFO IRQ for FDCan RX on H7

[jtmyz9]

Summary of changes

Fixing mapping of FDCan RX IRQ for H7 chips
Resolves #15144

Impact of changes

Minor change to precompiler statements in can_api.c in Targets/TARGET_STM folder

Migration actions required

Documentation

Change precompiler statements such that H7 family uses FDCAN_IT_RX_FIFO0_NEW_MESSAGE for triggering CAN::RxIRQ

- #if (defined FDCAN_IT_RX_BUFFER_NEW_MESSAGE)
+ #if (defined FDCAN_IT_RX_BUFFER_NEW_MESSAGE) && !defined(TARGET_STM32H7)
    if (__HAL_FDCAN_GET_IT_SOURCE(&CanHandle, FDCAN_IT_RX_BUFFER_NEW_MESSAGE)) {
        if (__HAL_FDCAN_GET_FLAG(&CanHandle, FDCAN_IT_RX_BUFFER_NEW_MESSAGE)) {
            __HAL_FDCAN_CLEAR_FLAG(&CanHandle, FDCAN_IT_RX_BUFFER_NEW_MESSAGE);
@@ -628,7 +628,7 @@ void can_irq_set(can_t *obj, CanIrqType type, uint32_t enable)
            interrupts = FDCAN_IT_TX_COMPLETE;
            break;
        case IRQ_RX:
- #if (defined FDCAN_IT_RX_BUFFER_NEW_MESSAGE)
+ #if (defined FDCAN_IT_RX_BUFFER_NEW_MESSAGE) && !defined(TARGET_STM32H7)
            interrupts = FDCAN_IT_RX_BUFFER_NEW_MESSAGE;
#else
            interrupts = FDCAN_IT_RX_FIFO0_NEW_MESSAGE;

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Pull request type

[x] Patch update (Bug fix / Target update / Docs update / Test update / Refactor)
[] Feature update (New feature / Functionality change / New API)
[] Major update (Breaking change E.g. Return code change / API behaviour change)

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Test results

[] No Tests required for this change (E.g docs only update)
[x] Covered by existing mbed-os tests (Greentea or Unittest)
[] Tests / results supplied as part of this PR

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Reviewers

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[jeromecoutant]

Resolves #15144

@mynameismichael @pmancele @veppikeppi @AilWe

[0xc0170]

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