input/atari: Fix mouse movement and button mapping

Up and down movements were reversed, left and right buttons were swapped.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

drivers/input/mouse/atarimouse.c

@@ -78,14 +78,14 @@ static void atamouse_interrupt(char *buf)
 
 	/* only relative events get here */
 	dx = buf[1];
-	dy = -buf[2];
+	dy = buf[2];
 
 	input_report_rel(atamouse_dev, REL_X, dx);
 	input_report_rel(atamouse_dev, REL_Y, dy);
 
-	input_report_key(atamouse_dev, BTN_LEFT,   buttons & 0x1);
+	input_report_key(atamouse_dev, BTN_LEFT,   buttons & 0x4);
 	input_report_key(atamouse_dev, BTN_MIDDLE, buttons & 0x2);
-	input_report_key(atamouse_dev, BTN_RIGHT,  buttons & 0x4);
+	input_report_key(atamouse_dev, BTN_RIGHT,  buttons & 0x1);
 
 	input_sync(atamouse_dev);