regulator: palmas: Add tps65917 compatible string

Add tps65917 compatible string.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/Documentation/devicetree/bindings/regulator/palmas-pmic.txt b/Documentation/devicetree/bindings/regulator/palmas-pmic.txt
index 42e6b6b..725393c 100644
--- a/Documentation/devicetree/bindings/regulator/palmas-pmic.txt
+++ b/Documentation/devicetree/bindings/regulator/palmas-pmic.txt
@@ -7,6 +7,7 @@
   ti,twl6037-pmic
   ti,tps65913-pmic
   ti,tps65914-pmic
+  ti,tps65917-pmic
 and also the generic series names
   ti,palmas-pmic
 - interrupt-parent : The parent interrupt controller which is palmas.