staging: rtl8723bs: os_dep: Remove Unneeded variable ret

fix below issue reported by coccicheck

drivers/staging/rtl8723bs/os_dep/ioctl_linux.c:2685:5-8: Unneeded
variable: "ret". Return "0" on line 3266
Signed-off-by: Hariprasad Kelam <hariprasad.kelam@gmail.com>

----
Changes in v2:
  - make subject line more clean
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/os_dep/ioctl_linux.c

@@ -2682,7 +2682,6 @@ static int rtw_dbg_port(struct net_device *dev,
                                struct iw_request_info *info,
                                union iwreq_data *wrqu, char *extra)
 {
-	int ret = 0;
 	u8 major_cmd, minor_cmd;
 	u16 arg;
 	u32 extra_arg, *pdata, val32;
@@ -3263,7 +3262,7 @@ static int rtw_dbg_port(struct net_device *dev,
 	}
 
 
-	return ret;
+	return 0;
 
 }