implement board specific helper spll parameters

3 jobs from peter_gain_shed in 43 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Compile
failed #12252
wrpc_sw
make_all

00:20

failed #12253
wrpc_sw
make_rt_cpu

00:09

failed #12251
wrpc_sw
make_wrpc_sw

00:12