Remove use of `buf` in `Trf797xEnableSlotCounter` and `Trf797xDisableSlotCounter`
Remove use of `buf` in `Trf797xEnableSlotCounter` and `Trf797xDisableSlotCounter`

hydrabus/hydrafw,Baldanos/hydrafw,Baldanos/hydrafw,hydrabus/hydrafw,Baldanos/hydrafw,hydrabus/hydrafw