RTEMS | Add the support for i2c driver in the aarch64/raspberrypi bsp (!363)

[Gedare Bloom (@gedare)]

Gedare Bloom started a new discussion on bsps/aarch64/raspberrypi/i2c/raspberrypi-i2c.c: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/363#note_125184

 > +  device != raspberrypi_bscm5 &&
 > +  device != raspberrypi_bscm6
 > +) {
 > +  return RTEMS_INVALID_NUMBER;
 > +}
 > +
 > +
 > +  bus = (raspberrypi_i2c_bus *) i2c_bus_alloc_and_init( sizeof( *bus ) );
 > +  if ( bus == NULL ) {
 > +    return RTEMS_NO_MEMORY;
 > +  }
 > +
 > +  bus_path = rpi_select_bus( device );
 > +  if ( bus_path == NULL ) {
 > +    i2c_bus_destroy_and_free( &bus->base );
 > +    return RTEMS_INVALID_NUMBER;

you can move this block up before you call `i2c_bus_alloc_and_init(), so that in the error case you don't bother with allocating and then destroying the `bus`.

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/363#note_125184
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