crypto: chainiv - Use kcrypto_wq instead of keventd_wq

keventd_wq has potential starvation problem, so use dedicated
kcrypto_wq instead.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 24c31ef..4a3e6b2 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -56,6 +56,7 @@
 	tristate
 	select CRYPTO_ALGAPI2
 	select CRYPTO_RNG2
+	select CRYPTO_WORKQUEUE
 
 config CRYPTO_HASH
 	tristate