drm/vblank: Switch to use %ptSp

Use %ptSp instead of open coded variants to print content of
struct timespec64 in human readable format.

Signed-off-by: Andy Shevchenko <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Reviewed-by: Petr Mladek <[e-mail]>
Signed-off-by: Petr Mladek <[e-mail]>

drivers/gpu/drm/drm_vblank.c

···
 	ts_vblank_time = ktime_to_timespec64(*vblank_time);
 
 	drm_dbg_vbl(dev,
-		    "crtc %u : v p(%d,%d)@ %lld.%06ld -> %lld.%06ld [e %d us, %d rep]\n",
-		    pipe, hpos, vpos,
-		    (u64)ts_etime.tv_sec, ts_etime.tv_nsec / 1000,
-		    (u64)ts_vblank_time.tv_sec, ts_vblank_time.tv_nsec / 1000,
+		    "crtc %u : v p(%d,%d)@ %ptSp -> %ptSp [e %d us, %d rep]\n",
+		    pipe, hpos, vpos, &ts_etime, &ts_vblank_time,
 		    duration_ns / 1000, i);
 
 	return true;