Remove unused is_softmmu parameter from cpu_handle_mmu_fault

Parameter is_softmmu (and its evil mutant twin brother is_softmuu)
is not used in cpu_*_handle_mmu_fault() functions, remove them
and adjust callers.

Acked-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/user-exec.c b/user-exec.c
index 14c0f25..abf6885 100644
--- a/user-exec.c
+++ b/user-exec.c
@@ -102,7 +102,7 @@
     }
 
     /* see if it is an MMU fault */
-    ret = cpu_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
+    ret = cpu_handle_mmu_fault(env, address, is_write, MMU_USER_IDX);
     if (ret < 0) {
         return 0; /* not an MMU fault */
     }