[XFRM]: Remove ifdef crypto.

and select the crypto subsystem if neccessary

Signed-off-by: Sebastian Siewior <sebastian@breakpoint.cc>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/xfrm/Kconfig b/net/xfrm/Kconfig
index 6b5b50f..8f9dbec 100644
--- a/net/xfrm/Kconfig
+++ b/net/xfrm/Kconfig
@@ -3,6 +3,7 @@
 #
 config XFRM
        bool
+       select CRYPTO
        depends on NET
 
 config XFRM_USER