ALSA: hda - Add basic tracepoints

Add a few tracepoints to HD-audio driver.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/Makefile b/sound/pci/hda/Makefile
index 87365d5..f928d66 100644
--- a/sound/pci/hda/Makefile
+++ b/sound/pci/hda/Makefile
@@ -6,6 +6,9 @@
 snd-hda-codec-$(CONFIG_SND_HDA_HWDEP) += hda_hwdep.o
 snd-hda-codec-$(CONFIG_SND_HDA_INPUT_BEEP) += hda_beep.o
 
+# for trace-points
+CFLAGS_hda_codec.o := -I$(src)
+
 snd-hda-codec-realtek-objs :=	patch_realtek.o
 snd-hda-codec-cmedia-objs :=	patch_cmedia.o
 snd-hda-codec-analog-objs :=	patch_analog.o