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

[Shaunak Datar (@skdatar)]

Shaunak Datar commented on a discussion on bsps/aarch64/raspberrypi/i2c/raspberrypi-i2c.c: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/363#note_121958

 > +
 > +static int rpi_i2c_transfer(i2c_bus *base, i2c_msg *msgs, uint32_t msg_count)
 > +{
 > +    raspberrypi_i2c_bus *bus = (raspberrypi_i2c_bus *)base;
 > +    int rv = 0;
 > +    uint32_t i;
 > +
 > +    for (i = 0; i < msg_count; ++i)
 > +    {
 > +        if (msgs[i].flags & I2C_M_RECV_LEN)
 > +        {
 > +            return RTEMS_INVALID_NUMBER;
 > +        }
 > +    }
 > +
 > +    for (i = 0; i < msg_count; i++)

The RPI4b does not support the I2C_M_RECV_LEN. So I believe any message with this flag should fail. But still I am a little unsure- what do you think, should I merge it in one single loop?

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/363#note_121958
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