crypto: caam - fix smatch warnings

Fix the following smatch warnings:

drivers/crypto/caam/caamalg.c:2350 aead_edesc_alloc() warn: we tested 'src_nents' before and it was 'true'
drivers/crypto/caam/caamrng.c:351 caam_rng_init() error: no modifiers for allocation.
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/caam/caamalg.c

@@ -2346,10 +2346,8 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
 
 	/* Check if data are contiguous. */
 	all_contig = !src_nents;
-	if (!all_contig) {
-		src_nents = src_nents ? : 1;
+	if (!all_contig)
 		sec4_sg_len = src_nents;
-	}
 
 	sec4_sg_len += dst_nents;
 

drivers/crypto/caam/caamrng.c

@@ -348,7 +348,7 @@ static int __init caam_rng_init(void)
 		pr_err("Job Ring Device allocation for transform failed\n");
 		return PTR_ERR(dev);
 	}
-	rng_ctx = kmalloc(sizeof(*rng_ctx), GFP_DMA);
+	rng_ctx = kmalloc(sizeof(*rng_ctx), GFP_DMA | GFP_KERNEL);
 	if (!rng_ctx) {
 		err = -ENOMEM;
 		goto free_caam_alloc;