m68k mmap2 fixes.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4106 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 72b80e3..a15c935 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -4086,10 +4086,8 @@
 #endif
 #ifdef TARGET_NR_mmap2
     case TARGET_NR_mmap2:
-#if defined(TARGET_SPARC) || defined(TARGET_MIPS)
+#ifndef MMAP_SHIFT
 #define MMAP_SHIFT 12
-#else
-#define MMAP_SHIFT TARGET_PAGE_BITS
 #endif
         ret = get_errno(target_mmap(arg1, arg2, arg3,
                                     target_to_host_bitmask(arg4, mmap_flags_tbl),