libgo: fix GOARCH_PHYSPAGESIZE for ia64
    
    From Andreas Schwab.
    
    Reviewed-on: https://go-review.googlesource.com/32537

From-SVN: r241757
diff --git a/libgo/configure.ac b/libgo/configure.ac
index 2951392..ed2edd3 100644
--- a/libgo/configure.ac
+++ b/libgo/configure.ac
@@ -254,7 +254,7 @@
     GOARCH=ia64
     GOARCH_FAMILY=IA64
     GOARCH_CACHELINESIZE=16384
-    GOARCH_PHYSPAGESIZE=8192
+    GOARCH_PHYSPAGESIZE=65536
     ;;
   m68k*-*-*)
     GOARCH=m68k