build: disable Xen on ARM

While ARM could present the xenpv machine, it does not and trying to enable
it breaks compilation.  Revert to the previous test which only looked at
$target_name, not $cpu.

Fixes: 3b6b75506de44c5070639943c30a0ad5850f5d02
Reported-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 20170711100049.20513-1-pbonzini@redhat.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/configure b/configure
index 806658c98b..5096cbcf14 100755
--- a/configure
+++ b/configure
@@ -202,9 +202,9 @@ supported_kvm_target() {
 supported_xen_target() {
     test "$xen" = "yes" || return 1
     glob "$1" "*-softmmu" || return 1
-    case "${1%-softmmu}:$cpu" in
-        arm:arm | aarch64:aarch64 | \
-        i386:i386 | i386:x86_64 | x86_64:i386 | x86_64:x86_64)
+    # Only i386 and x86_64 provide the xenpv machine.
+    case "${1%-softmmu}" in
+        i386|x86_64)
             return 0
         ;;
     esac