qemu/target_info: Add target_arm() helper

Add a helper to distinct whether the binary is targetting
ARM (32-bit only) or not.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Acked-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20251021210144.58108-1-philmd@linaro.org>

include/qemu/target-info.h

@@ -50,4 +50,11 @@ const char *target_cpu_type(void);
  */
 bool target_big_endian(void);
 
+/**
+ * target_arm:
+ *
+ * Returns whether the target architecture is ARM (32-bit, not Aarch64).
+ */
+bool target_arm(void);
+
 #endif