regmap: Make _regmap_write() global

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 3596465..d786ddc 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -296,8 +296,8 @@
 	return ret;
 }
 
-static int _regmap_write(struct regmap *map, unsigned int reg,
-			 unsigned int val)
+int _regmap_write(struct regmap *map, unsigned int reg,
+		  unsigned int val)
 {
 	int ret;
 	BUG_ON(!map->format.format_write && !map->format.format_val);