crypto: testmgr - add chunked test cases for chacha20

We failed to catch a bug in the chacha20 code after porting it to the
skcipher API. We would have caught it if any chunked tests had been
defined, so define some now so we will catch future regressions.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/testmgr.h

@@ -32675,6 +32675,10 @@ static const struct cipher_testvec chacha20_enc_tv_template[] = {
 			  "\x5b\x86\x2f\x37\x30\xe3\x7c\xfd"
 			  "\xc4\xfd\x80\x6c\x22\xf2\x21",
 		.rlen	= 375,
+		.also_non_np = 1,
+		.np	= 3,
+		.tap	= { 375 - 20, 4, 16 },
+
 	}, { /* RFC7539 A.2. Test Vector #3 */
 		.key	= "\x1c\x92\x40\xa5\xeb\x55\xd3\x8a"
 			  "\xf3\x33\x88\x86\x04\xf6\xb5\xf0"
@@ -33049,6 +33053,9 @@ static const struct cipher_testvec chacha20_enc_tv_template[] = {
 			  "\xa1\xed\xad\xd5\x76\xfa\x24\x8f"
 			  "\x98",
 		.rlen	= 1281,
+		.also_non_np = 1,
+		.np	= 3,
+		.tap	= { 1200, 1, 80 },
 	},
 };