regulator: Fix the function name in documentation

The function name in kernel-doc for regulator_map_voltage_linear_range()
was wrong.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/drivers/regulator/helpers.c b/drivers/regulator/helpers.c
index cbc3909..3bbb326 100644
--- a/drivers/regulator/helpers.c
+++ b/drivers/regulator/helpers.c
@@ -275,7 +275,7 @@
 EXPORT_SYMBOL_GPL(regulator_map_voltage_linear);
 
 /**
- * regulator_map_voltage_linear - map_voltage() for multiple linear ranges
+ * regulator_map_voltage_linear_range - map_voltage() for multiple linear ranges
  *
  * @rdev: Regulator to operate on
  * @min_uV: Lower bound for voltage