bsd-user/arm/target_arch_sysarch.h: Use consistent include guards

As part of upstreaming, the include guards have been made more
consistent. Update this file to use the new guards.

Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

bsd-user/arm/target_arch_sysarch.h

@@ -17,8 +17,8 @@
  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef BSD_USER_ARCH_SYSARCH_H_
-#define BSD_USER_ARCH_SYSARCH_H_
+#ifndef _TARGET_ARCH_SYSARCH_H_
+#define _TARGET_ARCH_SYSARCH_H_
 
 #include "target_syscall.h"
 #include "target_arch.h"
@@ -75,4 +75,4 @@ static inline void do_freebsd_arch_print_sysarch(
     }
 }
 
-#endif /*!BSD_USER_ARCH_SYSARCH_H_ */
+#endif /*!_TARGET_ARCH_SYSARCH_H_ */