esp: select CRYPTO_SEQIV

Commit f23efcbc ("crypto: ctr - no longer needs CRYPTO_SEQIV") made
CRYPTO_CTR stop selecting CRYPTO_SEQIV.  This breaks IPsec for most
users since GCM and several other encryption algorithms require "seqiv"
-- and RFC 8221 lists AES-GCM as "MUST" be implemented.

Just make XFRM_ESP select CRYPTO_SEQIV.

Fixes: f23efcbc ("crypto: ctr - no longer needs CRYPTO_SEQIV")
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Corentin Labbe <clabbe@baylibre.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

net/xfrm/Kconfig

@@ -86,6 +86,7 @@ config XFRM_ESP
 	select CRYPTO_SHA1
 	select CRYPTO_DES
 	select CRYPTO_ECHAINIV
+	select CRYPTO_SEQIV
 
 config XFRM_IPCOMP
 	tristate