tree bcf570a51745073fd9f36ef313cfb3afc29ee17a
parent 13a9751a8db16eae90c0191b4c8179cace0d11b9
author Patrick Williams <patrick@stwcx.xyz> 1680798612 -0500
committer Patrick Williams <patrick@stwcx.xyz> 1680798821 -0500

meta-phosphor: slpd-lite: remove env call from service file

We are suppose to use direct executable calls in service files
rather than indirections through /bin/env (See Anti-patterns).

Tested:
```
root@witherspoon:~# systemctl status slpd-lite
* slpd-lite.service - Lightweight SLP Server
     Loaded: loaded (/lib/systemd/system/slpd-lite.service; enabled; preset: enabled)
     Active: active (running) since Thu 2023-04-06 16:32:29 UTC; 58s ago
   Main PID: 205 (slpd)
        CPU: 70ms
     CGroup: /system.slice/slpd-lite.service
             `-205 /usr/sbin/slpd

Apr 06 16:32:29 witherspoon systemd[1]: Started Lightweight SLP Server.
```

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I08c0eaff39798fb3095d816389a8752b343164e7