[PATCH -next] regulator: bd9571mwv: Make symbol 'dev_attr_backup_mode' static

[Wei Yongjun]

Fixes the following sparse warning:

drivers/regulator/bd9571mwv-regulator.c:220:1: warning:
 symbol 'dev_attr_backup_mode' was not declared. Should it be static?

Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
---
 drivers/regulator/bd9571mwv-regulator.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/bd9571mwv-regulator.c b/drivers/regulator/bd9571mwv-regulator.c
index c44613b..274c5ed 100644
--- a/drivers/regulator/bd9571mwv-regulator.c
+++ b/drivers/regulator/bd9571mwv-regulator.c
@@ -217,7 +217,7 @@ static ssize_t backup_mode_store(struct device *dev,
 	return count;
 }
 
-DEVICE_ATTR_RW(backup_mode);
+static DEVICE_ATTR_RW(backup_mode);
 
 static int bd9571mwv_suspend(struct device *dev)
 {