[PATCH -next] ASoC: SOF: Intel: Mark cht_debugfs as __maybe_unused

[YueHaibing]

When CONFIG_SND_SOC_SOF_BAYTRAIL is not set, gcc warns:

sound/soc/sof/intel/byt.c:85:41: warning: ‘cht_debugfs’ defined but not used 
[-Wunused-const-variable=]
 static const struct snd_sof_debugfs_map cht_debugfs[] = {
                                         ^~~~~~~~~~~
Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 sound/soc/sof/intel/byt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/sof/intel/byt.c b/sound/soc/sof/intel/byt.c
index f872bb1f2682..1c75e4220e9d 100644
--- a/sound/soc/sof/intel/byt.c
+++ b/sound/soc/sof/intel/byt.c
@@ -82,7 +82,7 @@ static const struct snd_sof_debugfs_map byt_debugfs[] = {
         SOF_DEBUGFS_ACCESS_ALWAYS},
 };
 
-static const struct snd_sof_debugfs_map cht_debugfs[] = {
+static const struct snd_sof_debugfs_map __maybe_unused cht_debugfs[] = {
        {"dmac0", BYT_DSP_BAR, DMAC0_OFFSET, DMAC_SIZE,
         SOF_DEBUGFS_ACCESS_ALWAYS},
        {"dmac1", BYT_DSP_BAR,  DMAC1_OFFSET, DMAC_SIZE,
-- 
2.17.1