regulator: lp873x: Add support for populating input supply

In order to have a proper topology of regulators for a platform, each
registering regulator needs to populate supply_name field for identifying
its supply's name. Add supply_name field for lp873x regulators.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/drivers/regulator/lp873x-regulator.c b/drivers/regulator/lp873x-regulator.c
index e504b91..70e3df6 100644
--- a/drivers/regulator/lp873x-regulator.c
+++ b/drivers/regulator/lp873x-regulator.c
@@ -24,6 +24,7 @@
 	[_id] = {							\
 		.desc = {						\
 			.name			= _name,		\
+			.supply_name		= _of "-in",		\
 			.id			= _id,			\
 			.of_match		= of_match_ptr(_of),	\
 			.regulators_node	= of_match_ptr("regulators"),\