linux-user: fix build errors for mmap2-only ports

The current print_mmap func is only enabled when the target supports the
mmap syscall, but both mmap and mmap2 syscalls use it.  This leads to a
build failure when the target supports mmap2 but not mmap.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Riku Voipio <riku.voipio@nokia.com>

linux-user/strace.c

@@ -1203,7 +1203,7 @@ print_utimensat(const struct syscallname *name,
 }
 #endif
 
-#ifdef TARGET_NR_mmap
+#if defined(TARGET_NR_mmap) || defined(TARGET_NR_mmap2)
 static void
 print_mmap(const struct syscallname *name,
     abi_long arg0, abi_long arg1, abi_long arg2,