DA: Simplify writeZclAttribute
DA: Simplify writeZclAttribute

The eeror check is redundant, since the function will bail out due missing parameters.
dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin