crypto: chacha20poly1305 - Convert to new AEAD interface

This patch converts rfc7539 and rfc7539esp to the new AEAD interface.
The test vectors for rfc7539esp have also been updated to include
the IV.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Tested-by: Martin Willi <martin@strongswan.org>

crypto/testmgr.h

@@ -23577,8 +23577,9 @@ static struct aead_testvec rfc7539esp_enc_tv_template[] = {
 		.klen	= 36,
 		.iv	= "\x01\x02\x03\x04\x05\x06\x07\x08",
 		.assoc	= "\xf3\x33\x88\x86\x00\x00\x00\x00"
-			  "\x00\x00\x4e\x91",
-		.alen	= 12,
+			  "\x00\x00\x4e\x91\x01\x02\x03\x04"
+			  "\x05\x06\x07\x08",
+		.alen	= 20,
 		.input	= "\x49\x6e\x74\x65\x72\x6e\x65\x74"
 			  "\x2d\x44\x72\x61\x66\x74\x73\x20"
 			  "\x61\x72\x65\x20\x64\x72\x61\x66"
@@ -23664,8 +23665,9 @@ static struct aead_testvec rfc7539esp_dec_tv_template[] = {
 		.klen	= 36,
 		.iv	= "\x01\x02\x03\x04\x05\x06\x07\x08",
 		.assoc	= "\xf3\x33\x88\x86\x00\x00\x00\x00"
-			  "\x00\x00\x4e\x91",
-		.alen	= 12,
+			  "\x00\x00\x4e\x91\x01\x02\x03\x04"
+			  "\x05\x06\x07\x08",
+		.alen	= 20,
 		.input	= "\x64\xa0\x86\x15\x75\x86\x1a\xf4"
 			  "\x60\xf0\x62\xc7\x9b\xe6\x43\xbd"
 			  "\x5e\x80\x5c\xfd\x34\x5c\xf3\x89"