Return 1 from pmap_protect_tte() instead of 0. When used with

tsb_foreach(), 0 signals to terminate the tsb traversal, so when
tsb_foreach() was used in pmap_protect() (which only happens when
the area to be protected is larger than PMAP_TSB_THRESH = 16MB), only
the first tsb entry in the specified range would be protected.

Reported by:	Andrew Belashov <bel@orel.ru>

sys/sparc64/sparc64/pmap.c

@@ -1161,7 +1161,7 @@ pmap_protect_tte(struct pmap *pm, struct pmap *pm2, struct tte *tp,
 		if ((data & TD_W) != 0 && pmap_track_modified(pm, va))
 			vm_page_dirty(m);
 	}
-	return (0);
+	return (1);
 }
 
 /*