NetworkProtocol: fix hardcoded property name in handleProtocolEnabled

handleProtocolEnabled() used the hardcoded string "IPMI/ProtocolEnabled"
as the Redfish property name in both setDbusProperty calls, meaning DBus
errors for SSH were incorrectly reported against IPMI/ProtocolEnabled.

Add a redfishProperty parameter so each call site passes the correct
path. Update the IPMI call site to pass "IPMI/ProtocolEnabled" and the
SSH call site to pass "SSH/ProtocolEnabled" ensuring DBus errors surface
against the right Redfish property.

Tested :

```
curl -k -X PATCH -H "Content-Type: application/json"  -d '{"SSH":{"ProtocolEnabled":false}}'
 https://${BMC_IP}/redfish/v1/Managers/BMC_0/NetworkProtocol -u root:0penBmc -v

returned
 < HTTP/2 204

Terminal validation

#busctl get-property xyz.openbmc_project.Control.Service.Manager \
>   /xyz/openbmc_project/control/service/dropbear \
>   xyz.openbmc_project.Control.Service.Attributes Running
b false

#systemctl status dropbear.socket
* dropbear.socket
 Loaded: loaded (/usr/lib/systemd/system/dropbear.socket; disabled; preset: enabled)
 Active: inactive (dead)
 Listen: [::]:22 (Stream)
 Accepted: 0; Connected: 0;

curl -k https://${BMC_IP}/redfish/v1/Managers/BMC_0/NetworkProtocol -u root:0penBmc -v
{
  "@odata.id": "/redfish/v1/Managers/BMC_0/NetworkProtocol",
  "@odata.type": "#ManagerNetworkProtocol.v1_9_0.ManagerNetworkProtocol",
  "Description": "Manager Network Service",
  "FQDN": "gb200nvl-bmc",
  "HTTP": {
    "Port": null,
    "ProtocolEnabled": false
  },
  "HTTPS": {
    "Certificates": {
      "@odata.id": "/redfish/v1/Managers/BMC_0/NetworkProtocol/HTTPS/Certificates"
    },
    "Port": 443,
    "ProtocolEnabled": true
  },
  "HostName": "gb200nvl-bmc",
  "IPMI": {
    "Port": 623,
    "ProtocolEnabled": true
  },
  "Id": "NetworkProtocol",
  "NTP": {
    "NTPServers": [],
    "NetworkSuppliedServers": [],
    "ProtocolEnabled": true
  },
  "Name": "Manager Network Protocol",
  "Oem": {
    "Nvidia": {
      "Rsyslog": {
        "@odata.type": "#NvidiaNetworkProtocol.v1_1_0.Rsyslog",
        "Address": "",
        "Filter": {
          "Facilities": [],
          "LowestSeverity": "Error"
        },
        "Port": 0,
        "RFCFormat": "RFC3164",
        "State": "Disabled",
        "TLS": "Disabled",
        "TransportProtocol": "TCP"
      }
    }
  },
  "SSH": {
    "Port": null,
    "ProtocolEnabled": false
  },
  "Status": {
    "Health": "OK",
    "State": "Enabled"
  }
}

```
Change-Id: I4394c1b33a33f15a5086b2e55baf85dbf80bceca
Signed-off-by: Chandramohan Harkude <chandramohan.harkude@gmail.com>