crypto: ccp - Use int type to store negative error codes

Change the 'ret' variable in __sev_do_cmd_locked() from unsigned int to
int, as it needs to store negative error codes.

No effect on runtime.

Signed-off-by: Qianfeng Rong <rongqianfeng@vivo.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Author: qianfengrong

drivers/crypto/ccp/sev-dev.c

@@ -848,9 +848,10 @@ static int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret)
 	struct sev_device *sev;
 	unsigned int cmdbuff_hi, cmdbuff_lo;
 	unsigned int phys_lsb, phys_msb;
-	unsigned int reg, ret = 0;
+	unsigned int reg;
 	void *cmd_buf;
 	int buf_len;
+	int ret = 0;
 
 	if (!psp || !psp->sev_data)
 		return -ENODEV;