crypto: nx - remove 842-nx null checks

Remove the null checks for tfm, src, slen, dst, dlen; tfm will never
be null and the other fields are always expected to be set correctly.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/nx/nx-842-crypto.c

@@ -298,9 +298,6 @@ static int nx842_crypto_compress(struct crypto_tfm *tfm,
 	bool add_header;
 	u16 ignore = 0;
 
-	if (!tfm || !src || !slen || !dst || !dlen)
-		return -EINVAL;
-
 	p.in = (u8 *)src;
 	p.iremain = slen;
 	p.out = dst;
@@ -483,9 +480,6 @@ static int nx842_crypto_decompress(struct crypto_tfm *tfm,
 	u16 ignore = 0;
 	bool usehw = true;
 
-	if (!tfm || !src || !slen || !dst || !dlen)
-		return -EINVAL;
-
 	p.in = (u8 *)src;
 	p.iremain = slen;
 	p.out = dst;