mm/vmscan: pass scan_control to mm_vmscan_reclaim_pages

mm_vmscan_reclaim_pages tracepoint 改为接收 struct scan_control 并在 TP_fast_assign 读取 sc->nr_scanned，nr_reclaimed 仍单独传；tracefs 格式不变，但 raw_tp/BPF 的 TP_PROTO 变化需适配。