crypto: dh - Remove pointless checks for NULL 'p' and 'g'

Neither 'p' nor 'g' can be NULL, as they were unpacked using
crypto_dh_decode_key().  And it makes no sense for them to be optional.
So remove the NULL checks that were copy-and-pasted into both modules.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/dh.c

@@ -53,9 +53,6 @@ static int dh_check_params_length(unsigned int p_len)
 
 static int dh_set_params(struct dh_ctx *ctx, struct dh *params)
 {
-	if (unlikely(!params->p || !params->g))
-		return -EINVAL;
-
 	if (dh_check_params_length(params->p_size << 3))
 		return -EINVAL;
 

drivers/crypto/qat/qat_common/qat_asym_algs.c

@@ -443,9 +443,6 @@ static int qat_dh_set_params(struct qat_dh_ctx *ctx, struct dh *params)
 	struct qat_crypto_instance *inst = ctx->inst;
 	struct device *dev = &GET_DEV(inst->accel_dev);
 
-	if (unlikely(!params->p || !params->g))
-		return -EINVAL;
-
 	if (qat_dh_check_params_length(params->p_size << 3))
 		return -EINVAL;