message: ims: Small logging change for C init method
  Added a bit more description if the library cannot set I2C
  standard mode.
diff: @@ -63,7 +63,9 @@ ims_context* ims_init(int16_t i2c_bus, int16_t i2c_address)
  /* This device must run at 100kHz */
  if (mraa_i2c_frequency(dev->_i2c_context, MRAA_I2C_STD))
  {
  - syslog(LOG_ERR, "%s: mraa_i2c_frequency() failed\n", __FUNCTION__);
  + syslog(LOG_ERR, "%s: mraa_i2c_frequency() failed. %s\n",
  + __FUNCTION__,
  + "This device requires I2C standard mode (100 kb/s)");
  goto ims_init_fail;
  }
  