ALSA: usb-audio: localize one-referrer variable

When accessed by one referrer inner a file, variables should have static
qualifier to declare local-linkage.

This commit fixes the bug. Sparse generated below warnings.
sound/usb/mixer_us16x08.c:156:13: warning: duplicate const
sound/usb/mixer_us16x08.c:156:18: warning: symbol 'route_names' was not declared. Should it be static?

Fixes: d2bb390a2081 ("ALSA: usb-audio: Tascam US-16x08 DSP mixer quirk")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/sound/usb/mixer_us16x08.c b/sound/usb/mixer_us16x08.c
index 301939b8f472..019336f53acf 100644
--- a/sound/usb/mixer_us16x08.c
+++ b/sound/usb/mixer_us16x08.c
@@ -153,7 +153,7 @@ static const char ratio_map[] = {
 };
 
 /* route enumeration names */
-const const char *route_names[] = {
+static const char *const route_names[] = {
         "Master Left", "Master Right", "Output 1", "Output 2", "Output 3",
         "Output 4", "Output 5", "Output 6", "Output 7", "Output 8",
 };