configure: permit compilation on arm aarch64

support compiling on aarch64.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Claudio Fontana <claudio.fontana@huawei.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 51A5C5ED.90103@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

configure

@@ -386,6 +386,8 @@ elif check_define __s390__ ; then
   fi
 elif check_define __arm__ ; then
   cpu="arm"
+elif check_define __aarch64__ ; then
+  cpu="aarch64"
 elif check_define __hppa__ ; then
   cpu="hppa"
 else
@@ -408,6 +410,9 @@ case "$cpu" in
   armv*b|armv*l|arm)
     cpu="arm"
   ;;
+  aarch64)
+    cpu="aarch64"
+  ;;
   hppa|parisc|parisc64)
     cpu="hppa"
   ;;
@@ -4060,6 +4065,9 @@ if test "$linux" = "yes" ; then
   s390x)
     linux_arch=s390
     ;;
+  aarch64)
+    linux_arch=arm64
+    ;;
   *)
     # For most CPUs the kernel architecture name and QEMU CPU name match.
     linux_arch="$cpu"