crypto: arm/aes-neonbs - Use PTR_ERR_OR_ZERO()

Fix ptr_ret.cocci warnings:
arch/arm/crypto/aes-neonbs-glue.c:184:1-3: WARNING: PTR_ERR_OR_ZERO can be used
arch/arm/crypto/aes-neonbs-glue.c:261:1-3: WARNING: PTR_ERR_OR_ZERO can be used

Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR

Generated by: scripts/coccinelle/api/ptr_ret.cocci
Signed-off-by: Vasyl Gomonovych <gomonovych@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

arch/arm/crypto/aes-neonbs-glue.c

@@ -181,9 +181,8 @@ static int cbc_init(struct crypto_tfm *tfm)
 	struct aesbs_cbc_ctx *ctx = crypto_tfm_ctx(tfm);
 
 	ctx->enc_tfm = crypto_alloc_cipher("aes", 0, 0);
-	if (IS_ERR(ctx->enc_tfm))
-		return PTR_ERR(ctx->enc_tfm);
-	return 0;
+
+	return PTR_ERR_OR_ZERO(ctx->enc_tfm);
 }
 
 static void cbc_exit(struct crypto_tfm *tfm)
@@ -258,9 +257,8 @@ static int xts_init(struct crypto_tfm *tfm)
 	struct aesbs_xts_ctx *ctx = crypto_tfm_ctx(tfm);
 
 	ctx->tweak_tfm = crypto_alloc_cipher("aes", 0, 0);
-	if (IS_ERR(ctx->tweak_tfm))
-		return PTR_ERR(ctx->tweak_tfm);
-	return 0;
+
+	return PTR_ERR_OR_ZERO(ctx->tweak_tfm);
 }
 
 static void xts_exit(struct crypto_tfm *tfm)