Move guc_blocked fence to struct guc_state as the lock which protects
the fence lives there.

s/ce->guc_blocked/ce->guc_state.blocked/g

v2:
 (Daniele)
  - s/blocked_fence/blocked/g
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210909164744.31249-17-matthew.brost@intel.com