alpha: Enable system-call auditing support.

Signed-off-by: Zhenglong.cai <zhenglong.cai@cs2c.com.cn>
Signed-off-by: Matt Turner <mattst88@gmail.com>
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 97a2d9a..f6c6b34 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -17,6 +17,7 @@
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
+	select AUDIT_ARCH
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_SMP_IDLE_THREAD
 	select GENERIC_STRNCPY_FROM_USER
@@ -77,6 +78,8 @@
 source "init/Kconfig"
 source "kernel/Kconfig.freezer"
 
+config AUDIT_ARCH
+	bool
 
 menu "System setup"