crypto: hisilicon/sec - Use int type to store negative error codes

Change the 'ret' variable in sec_hw_init() from u32 to int, as
it needs to store either negative error codes or zero returned by
sec_ipv4_hashmask().

No effect on runtime.

Signed-off-by: Qianfeng Rong <rongqianfeng@vivo.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Author: qianfengrong

drivers/crypto/hisilicon/sec/sec_drv.c

@@ -922,7 +922,8 @@ static int sec_hw_init(struct sec_dev_info *info)
 	struct iommu_domain *domain;
 	u32 sec_ipv4_mask = 0;
 	u32 sec_ipv6_mask[10] = {};
-	u32 i, ret;
+	int ret;
+	u32 i;
 
 	domain = iommu_get_domain_for_dev(info->dev);