crypto: skcipher - Add dependency on ecb

As lskcipher requires the ecb wrapper for the transition add an
explicit dependency on it so that it is always present.  This can
be removed once all simple ciphers have been converted to lskcipher.
Reported-by: Nathan Chancellor <nathan@kernel.org>
Fixes: 705b52fe ("crypto: cbc - Convert from skcipher to lskcipher")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/Kconfig

@@ -85,6 +85,7 @@ config CRYPTO_SKCIPHER
 	tristate
 	select CRYPTO_SKCIPHER2
 	select CRYPTO_ALGAPI
+	select CRYPTO_ECB
 
 config CRYPTO_SKCIPHER2
 	tristate
@@ -689,7 +690,7 @@ config CRYPTO_CTS
 
 config CRYPTO_ECB
 	tristate "ECB (Electronic Codebook)"
-	select CRYPTO_SKCIPHER
+	select CRYPTO_SKCIPHER2
 	select CRYPTO_MANAGER
 	help
 	  ECB (Electronic Codebook) mode (NIST SP800-38A)