mtd: mtd_nandecctest: use prandom_bytes instead of get_random_bytes()

Using prandom_bytes() is enough. Because this data is only used
for testing, not used for cryptographic use.

Signed-off-by: Akinobu Mita <[e-mail]>
Cc: Artem Bityutskiy <[e-mail]>
Cc: David Woodhouse <[e-mail]>
Cc: "Theodore Ts'o" <[e-mail]>
Cc: Adrian Hunter <[e-mail]>
Cc: David Laight <[e-mail]>
Cc: Eilon Greenstein <[e-mail]>
Cc: Michel Lespinasse <[e-mail]>
Cc: Robert Love <[e-mail]>
Cc: Valdis Kletnieks <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/mtd/tests/mtd_nandecctest.c

···
 		goto error;
 	}
 
-	get_random_bytes(correct_data, size);
+	prandom_bytes(correct_data, size);
 	__nand_calculate_ecc(correct_data, size, correct_ecc);
 
 	for (i = 0; i < ARRAY_SIZE(nand_ecc_test); i++) {