projects: eval-powrms: extend precision calibration for reverse signal

For reverse signals a similar, 14 point PCHIP interpolatio is used for calibration

Signed-off-by: rbudai98 <[email protected]>

Author: rbudai98

projects/eval-powrms/src/examples/example/example.c

@@ -309,6 +309,7 @@ int example_main(void)
 	app_init_param.post_step_callback = &(screen_while);
 
 	display_entry = DISPLAY_ENTRY_SHOW;
+
 	ret = iio_app_init(&app, app_init_param);
 	if (ret)
 		return ret;