ck_brlock: Migrate to ck_pr_fence_X_Y interface.
ck_hp_fifo: Migrate to ck_pr_fence_X_Y functions.
ck_hp_stack: Migrate to ck_pr_fence_X_Y functions.
ck_epoch: Migrate to ck_pr_fence_X_Y.
ck_bytelock: Migrate to ck_pr_fence_X_Y.