STM32 CAN3: remove test of CAN_2 and CAN_3 ...

CAN_2 and CAN_3 are enum and not #define and this causes compilation error with GCC_ARM

Instead put back the test of CAN_NUM (which are defined in can_device.h).

STM32: Pass correct id to can_irq() for CAN3

Fix RTR position bit in TX mailbox register

STM32: fix error with CAN_3 not defined

STM32: Add support of CAN3 on STM32F413/F767

STM32: CAN: restore registers after can_reset ...

After reset the MCR register content needs to be restored so we're
introducing the can_registers_init function to be called at the first
init stage, but also after reset. We also store the can frequency to
go through the initialisation phase again.

STM32: CAN: store the mode in object context ...

In order to apply the same mode in case of reset, we store the current
requested mode in the HAL structure.

To make storage in a single place, we also change can_monitor to call
can_mode function as they actually acting on same registers.

STM32: CAN: do not overwite BTR register when setting frequency ...

BTR register has other bits than the ones calculated and set through
the can_speed function, so let's take care to only write to the
right registers.

STM32: Define CAN handle as part of can object ...

Instead of a static object, this will make driver
instantiation more robust and allow to re-use init
configuration on a need basis.

The CANName struct member is actually the CAN registers base address,
which is now available in the CanHandle.Instance field, so we don't need
CANName anymore.

STM32 CAN: Fix issue with speed function calculation

Fixing the problem where the CAN is initialized to the wrong frequency at startup regardless of the value set in the constructor. Issue #3863

Fix another typo

Fix coding style

Add timeout also on the 1st while loop

Optimize the use of the status value

Handle can_frequency sync error ...

add a timeout + return an error message

STM targets: the free irq function was not well implemented ...

the index of the table was out of range

Add can_init_freq for STM devices

can_write(): return error code when no tx mailboxes are available. (#3829)

Merge pull request #3828 from jeromecoutant/PR_CAN_TYPE ...

STM32 CAN API: correct format and type

STM32 CAN API: correct format and type ...

astyle done

DISCO_F469NI: allow the use of CAN2 instance when CAN1 is not activated

Revert "Coding style" ...

This reverts commit 32b801b.

Coding style

Add a #else to cover default STM32 devices for the IRQHandler functions. ...

Change also the coding style for the "{".

Add support to L4 targets.

Add support to F7 targets.

Add support to F4 targets.

Add F3 differences.

Add F2 differences. Mainly add support for CAN2 instance.