lcd: Remove HAVE_VIEWPORT_CLIP

This was only enabled for the mrobe500 and sansaconnect targets.
Most targets are therefore running without this "safety" measure,
and presumably we'd have noticed long ago if there was a problem.
So in all likelihood this is just a bunch of dead code that we
don't need to carry around.

Change-Id: I7d27701a38b1c2a985ee73fa6f277ad215d8d385

firmware/drivers/lcd-bitmap-common.c

@@ -139,11 +139,7 @@ struct viewport* LCDFN(set_viewport_ex)(struct viewport* vp, int flags)
         || vp->x + vp->width > LCDM(WIDTH)
         || vp->y + vp->height > LCDM(HEIGHT))
     {
-#if !defined(HAVE_VIEWPORT_CLIP)
         DEBUGF("ERROR: "
-#else
-        DEBUGF("NOTE: "
-#endif
             "set_viewport out of bounds: x: %d y: %d width: %d height:%d\n",
             vp->x, vp->y, vp->width, vp->height);
     }