ALSA: ice1724: Fix compile warning with CONFIG_PROC_FS=n

Just added a missing ifdef:
  sound/pci/ice1712/quartet.c:210:14: warning: 'get_binary' defined but not used [-Wunused-function]

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/sound/pci/ice1712/quartet.c b/sound/pci/ice1712/quartet.c
index 975e0357bd5a..71c6003ef338 100644
--- a/sound/pci/ice1712/quartet.c
+++ b/sound/pci/ice1712/quartet.c
@@ -203,6 +203,7 @@ static const char * const ext_clock_names[3] = {"IEC958 In", "Word Clock 1xFS",
 #define AK4620_DEEMVOL_REG      0x03
 #define AK4620_SMUTE            (1<<7)
 
+#ifdef CONFIG_PROC_FS
 /*
  * Conversion from int value to its binary form. Used for debugging.
  * The output buffer must be allocated prior to calling the function.
@@ -227,6 +228,7 @@ static char *get_binary(char *buffer, int value)
         buffer[pos] = '\0';
         return buffer;
 }
+#endif /* CONFIG_PROC_FS */
 
 /*
  * Initial setup of the conversion array GPIO <-> rate