drm/radeon/si: fix define for MC_SEQ_TRAIN_WAKEUP_CNTL
drm/radeon/si: fix define for MC_SEQ_TRAIN_WAKEUP_CNTL

From Alex Deucher
e123c82b11738a7b5f53df047b9634c13892bc06 in ubuntu 3.8
d5693761b2b4ff530c8af8af9ec55b6eae76e617 in mainline linux

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars