regmap: Export regmap_reinit_cache()

It's supposed to be there for drivers.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 04b4802..c89aa01 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -472,6 +472,7 @@
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(regmap_reinit_cache);
 
 /**
  * regmap_exit(): Free a previously allocated register map