sys/src/9k/k10: increase SEGMAPSIZE to 65536

sys/src/9k/k10/mem.h

@@ -74,7 +74,7 @@
  */
 #define PTEPERTAB	(256)
 #define PTEMAPMEM	(PTEPERTAB*PGSZ)
-#define SEGMAPSIZE	1984
+#define SEGMAPSIZE	65536
 #define SSEGMAPSIZE	16
 
 /*