STM32: serial: use proper macro to check interrupt

[LMESTM]

Description

Depending on families, different HAL macros are defined to check the
state of serial interrupts. In several cases, we can find only 1 macro:
__HAL_UART_GET_IT_SOURCE
Checks whether the specified UART interrupt has occurred or not

But in F0, F3, F7, L0, L4 there are 2 different macros
__HAL_UART_GET_IT
Checks whether the specified UART interrupt has occurred or not
__HAL_UART_GET_IT_SOURCE
Checks whether the specified UART interrupt source is enabled.

In the later case, __HAL_UART_GET_IT_SOURCE was being used so far,
but actually needs to be replaced by __HAL_UART_GET_IT. Using the right
macro, we also check the proper flags accordingly.

This PR solves issue #3452

Status

READY

Test

Tested with simple test that produce an overrun condition, and making sure the board won't freeze.
Test code below, with a wire on RX/TX of the 2nd serial named (uart):

#include "mbed.h"

RawSerial pc(USBTX, USBRX);
RawSerial uart(D8, D2);
DigitalOut led1(LED1);

// This function is called when a character goes into the RX buffer.
void rxCallback(void) {
    led1 = !led1;
    pc.putc(uart.getc());
}

void pcrxCallback(void) {
    uart.putc(pc.getc());
}

int main() {
    // Use a deliberatly slow baud to fill up the TX buffer,
    // and get overrun conditions
    uart.baud(1200);
    uart.attach(&rxCallback, Serial::RxIrq);
    pc.attach(&pcrxCallback, Serial::RxIrq);

    printf("Starting test loop:\n");
    wait(1);

    while (true) {
        wait(1);
    }
}

[LMESTM]

Found a side effect for part of this change: so just updated ..

[theotherjimmy]

@0xc0170 Could you find someone to review this?

[0xc0170]

One note, first line of teh commit message should be maximum 50 characters (you can see the wrapping here), can you update that please?

[LMESTM]

@0xc0170 Ok update done - do you want me to also update the PR title ?

[0xc0170]

@0xc0170 Ok update done - do you want me to also update the PR title ?

Yes, please

[LMESTM]

done as well

[0xc0170]

/morph test

[mbed-bot]

Result: SUCCESS

Your command has finished executing! Here's what you wrote!

/morph test

Output

mbed Build Number: 788

All builds and test passed!