lib/libcrc32c.c: use PTR_ERR_OR_ZERO

replace IS_ERR/PTR_ERR

Signed-off-by: Fabian Frederick <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

lib/libcrc32c.c

···
 static int __init libcrc32c_mod_init(void)
 {
 	tfm = crypto_alloc_shash("crc32c", 0, 0);
-	if (IS_ERR(tfm))
-		return PTR_ERR(tfm);
-
-	return 0;
+	return PTR_ERR_OR_ZERO(tfm);
 }
 
 static void __exit libcrc32c_mod_fini(void)