crypto: skcipher - rename the crypto_blkcipher module and kconfig option

Now that the blkcipher algorithm type has been removed in favor of
skcipher, rename the crypto_blkcipher kernel module to crypto_skcipher,
and rename the config options accordingly:

	CONFIG_CRYPTO_BLKCIPHER => CONFIG_CRYPTO_SKCIPHER
	CONFIG_CRYPTO_BLKCIPHER2 => CONFIG_CRYPTO_SKCIPHER2

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/net/xfrm/Kconfig b/net/xfrm/Kconfig
index 51bb601..3981bc0 100644
--- a/net/xfrm/Kconfig
+++ b/net/xfrm/Kconfig
@@ -16,7 +16,7 @@
 	select XFRM
 	select CRYPTO
 	select CRYPTO_HASH
-	select CRYPTO_BLKCIPHER
+	select CRYPTO_SKCIPHER
 
 if INET
 config XFRM_USER