modules: lvgl: Fix inverting x/y if screen is rotated

#70541 has an
issue where if the screen has been rotated, values calculated if
invert-x or invert-y are set will be overwritten.

This breaks the adafruit_2_8_tft_touch_v2 touchscreen as the
display is rotated by 90 degrees but uses invert-x and invert-y.

This change makes the invert-x and invert-y options independent
of screen rotation.

Signed-off-by: Glenn Andrews <glenn.andrews.42@gmail.com>

modules/lvgl/input/lvgl_pointer_input.c

@@ -61,37 +61,47 @@ static void lvgl_pointer_process_event(const struct device *dev, struct input_ev
 		return;
 	}
 
-	point->x = data->point_x;
-	point->y = data->point_y;
+	lv_coord_t point_x = data->point_x;
+	lv_coord_t point_y = data->point_y;
 
 	if (cfg->invert_x) {
 		if (cap->current_orientation == DISPLAY_ORIENTATION_NORMAL ||
 		    cap->current_orientation == DISPLAY_ORIENTATION_ROTATED_180) {
-			point->x = cap->x_resolution - data->point_x;
+			point_x = cap->x_resolution - point_x;
 		} else {
-			point->x = cap->y_resolution - data->point_x;
+			point_x = cap->y_resolution - point_x;
 		}
 	}
 
 	if (cfg->invert_y) {
 		if (cap->current_orientation == DISPLAY_ORIENTATION_NORMAL ||
 		    cap->current_orientation == DISPLAY_ORIENTATION_ROTATED_180) {
-			point->y = cap->y_resolution - data->point_y;
+			point_y = cap->y_resolution - point_y;
 		} else {
-			point->y = cap->x_resolution - data->point_y;
+			point_y = cap->x_resolution - point_y;
 		}
 	}
 
 	/* rotate touch point to match display rotation */
-	if (cap->current_orientation == DISPLAY_ORIENTATION_ROTATED_90) {
-		point->x = data->point_y;
-		point->y = cap->y_resolution - data->point_x;
-	} else if (cap->current_orientation == DISPLAY_ORIENTATION_ROTATED_180) {
-		point->x = cap->x_resolution - data->point_x;
-		point->y = cap->y_resolution - data->point_y;
-	} else if (cap->current_orientation == DISPLAY_ORIENTATION_ROTATED_270) {
-		point->x = cap->x_resolution - data->point_y;
-		point->y = data->point_x;
+	switch (cap->current_orientation) {
+	case DISPLAY_ORIENTATION_NORMAL:
+		point->x = point_x;
+		point->y = point_y;
+	case DISPLAY_ORIENTATION_ROTATED_90:
+		point->x = point_y;
+		point->y = cap->y_resolution - point_x;
+		break;
+	case DISPLAY_ORIENTATION_ROTATED_180:
+		point->x = cap->x_resolution - point_x;
+		point->y = cap->y_resolution - point_y;
+		break;
+	case DISPLAY_ORIENTATION_ROTATED_270:
+		point->x = cap->x_resolution - point_y;
+		point->y = point_x;
+		break;
+	default:
+		LOG_ERR("Invalid display orientation");
+		break;
 	}
 
 	/* filter readings within display */