crypto: fix crc64 testmgr digest byte order

The result is set in little endian, so the expected digest needs to
be consistent for big endian machines.

Fixes: f3813f4 ("crypto: add rocksoft 64b crc guard tag framework")
Reported-by: Vasily Gorbik <[email protected]>
Reported-by: Corentin Labbe <[email protected]>
Signed-off-by: Keith Busch <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>

Author: keithbusch

crypto/testmgr.h

@@ -3686,11 +3686,11 @@ static const struct hash_testvec crc64_rocksoft_tv_template[] = {
 	{
 		.plaintext	= zeroes,
 		.psize		= 4096,
-		.digest		= (u8 *)(u64[]){ 0x6482d367eb22b64eull },
+		.digest         = "\x4e\xb6\x22\xeb\x67\xd3\x82\x64",
 	}, {
 		.plaintext	= ones,
 		.psize		= 4096,
-		.digest		= (u8 *)(u64[]){ 0xc0ddba7302eca3acull },
+		.digest         = "\xac\xa3\xec\x02\x73\xba\xdd\xc0",
 	}
 };