drivers/net/wireless: Fix gcc-10 -Wrestrict

Fixes errors such as:

drivers/net/wireless/rtl8821cu/os_dep/linux/ioctl_mp.c: In function 'rtw_mp_txpower_index':
drivers/net/wireless/rtl8821cu/os_dep/linux/ioctl_mp.c:573:4: warning: 'sprintf' argument 3 overlaps destination object 'extra' [-Wrestrict]
error, forbidden warning:ioctl_mp.c:573
  573 |    sprintf(extra, "%s,pathb=%d", extra, txpower_inx);
      |    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/wireless/rtl8821cu/os_dep/linux/ioctl_mp.c:546:34: note: destination object referenced by 'restrict'-qualified argument 1 was declared here
  546 |     struct iw_point *wrqu, char *extra)
      |                            ~~~~~~^~~~~

Signed-off-by: Gleb Mazovetskiy <glex.spb@gmail.com>

Author: glebm

drivers/net/wireless/ew-7611ulb/core/rtw_mp.c

@@ -2093,14 +2093,17 @@ u32 mp_query_psd(PADAPTER pAdapter, u8 *data)
 
 	data[0] = '\0';
 
-	i = psd_start;
-	while (i < psd_stop) {
-		if (i >= psd_pts)
-			psd_data = rtw_GetPSDData(pAdapter, i - psd_pts);
-		else
-			psd_data = rtw_GetPSDData(pAdapter, i);
-		sprintf(data, "%s%x ", data, psd_data);
-		i++;
+	{
+		size_t extra_len = strlen(data);
+		i = psd_start;
+		while (i < psd_stop) {
+			if (i >= psd_pts)
+				psd_data = rtw_GetPSDData(pAdapter, i - psd_pts);
+			else
+				psd_data = rtw_GetPSDData(pAdapter, i);
+			extra_len += sprintf(data + extra_len, "%x ", psd_data);
+			i++;
+		}
 	}
 
 #ifdef CONFIG_LONG_DELAY_ISSUE

drivers/net/wireless/ew-7611ulb/os_dep/linux/ioctl_mp.c

@@ -1719,7 +1719,7 @@ int rtw_mp_tx(struct net_device *dev,
 			char *pextra = extra;
 			RTW_INFO("Got format [ch=%d,bw=%d,rate=%d,pwr=%d,ant=%d,tx=%d]\n", channel, bandwidth, rate, txpower, ant, txmode);
 			_rtw_memset(extra, 0, wrqu->data.length);
-			sprintf(extra, "Change Current channel %d to channel %d", padapter->mppriv.channel , channel);
+			pextra += sprintf(pextra, "Change Current channel %d to channel %d", padapter->mppriv.channel , channel);
 			padapter->mppriv.channel = channel;
 			SetChannel(padapter);
 			pHalData->current_channel = channel;
@@ -2074,6 +2074,7 @@ int rtw_efuse_mask_file(struct net_device *dev,
 		u8	count = 0;
 		u8	i = 0;
 		u32	datalen = 0;
+		size_t extra_len;
 
 		ptmp = extra;
 		pch = strsep(&ptmp, ",");
@@ -2099,12 +2100,13 @@ int rtw_efuse_mask_file(struct net_device *dev,
 
 		 } while (count < 64);
 
+		extra_len = strlen(extra);
 		for (i = 0; i < count; i++)
-			sprintf(extra, "%s:%02x", extra, maskfileBuffer[i]);
+			extra_len += sprintf(extra + extra_len, ":%02x", maskfileBuffer[i]);
 
 		padapter->registrypriv.bFileMaskEfuse = _TRUE;
 
-		sprintf(extra, "%s\nLoad Efuse Mask data %d hex ok\n", extra, count);
+		extra_len += sprintf(extra + extra_len, "\nLoad Efuse Mask data %d hex ok\n", count);
 		wrqu->data.length = strlen(extra);
 		return 0;
 	}
@@ -2522,16 +2524,18 @@ int rtw_mp_SetBT(struct net_device *dev,
 	mptbt_BtControlProcess(padapter, &BtReq);
 
 	if (readtherm == 0) {
+		size_t extra_len;
 		sprintf(extra, "BT thermal=");
 		for (i = 4; i < pMptCtx->mptOutLen; i++) {
 			if ((pMptCtx->mptOutBuf[i] == 0x00) && (pMptCtx->mptOutBuf[i + 1] == 0x00))
 				goto exit;
 
-			sprintf(extra, "%s %d ", extra, (pMptCtx->mptOutBuf[i] & 0x1f));
+			extra_len += sprintf(extra + extra_len, " %d ", (pMptCtx->mptOutBuf[i] & 0x1f));
 		}
 	} else {
+		size_t extra_len;
 		for (i = 4; i < pMptCtx->mptOutLen; i++)
-			sprintf(extra, "%s 0x%x ", extra, pMptCtx->mptOutBuf[i]);
+			extra_len += sprintf(extra + extra_len, " 0x%x ", pMptCtx->mptOutBuf[i]);
 	}
 
 exit:

drivers/net/wireless/rockchip_wlan/rtl8188eu/core/rtw_mp.c

@@ -2119,14 +2119,17 @@ u32 mp_query_psd(PADAPTER pAdapter, u8 *data)
 
 	data[0] = '\0';
 
-	i = psd_start;
-	while (i < psd_stop) {
-		if (i >= psd_pts)
-			psd_data = rtw_GetPSDData(pAdapter, i - psd_pts);
-		else
-			psd_data = rtw_GetPSDData(pAdapter, i);
-		sprintf(data, "%s%x ", data, psd_data);
-		i++;
+	{
+		size_t extra_len = strlen(data);
+		i = psd_start;
+		while (i < psd_stop) {
+			if (i >= psd_pts)
+				psd_data = rtw_GetPSDData(pAdapter, i - psd_pts);
+			else
+				psd_data = rtw_GetPSDData(pAdapter, i);
+			extra_len += sprintf(data + extra_len, "%x ", psd_data);
+			i++;
+		}
 	}
 
 #ifdef CONFIG_LONG_DELAY_ISSUE