hw/xen/hvm: Fix Aarch64 typo

There is no TARGET_ARM_64 definition. Luckily enough,
when TARGET_AARCH64 is defined, TARGET_ARM also is.

Fixes: 733766c ("hw/arm: introduce xenpvh machine")
Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
Reviewed-by: Pierrick Bouvier <[email protected]>
Reviewed-by: Richard Henderson <[email protected]>
Message-Id: <[email protected]>

Author: philmd

include/hw/xen/arch_hvm.h

@@ -1,5 +1,5 @@
 #if defined(TARGET_I386) || defined(TARGET_X86_64)
 #include "hw/i386/xen_arch_hvm.h"
-#elif defined(TARGET_ARM) || defined(TARGET_ARM_64)
+#elif defined(TARGET_ARM) || defined(TARGET_AARCH64)
 #include "hw/arm/xen_arch_hvm.h"
 #endif