regulator: max77802: Fix DT binding document reference

The DT binding doc references the max77802 clocks header file which makes
no sense since of course it doesn't contain data related to the regulators.

It's a copy and paste error, so add a reference to the correct header file.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/regulator/max77802.txt

@@ -60,7 +60,7 @@ The possible values for "regulator-initial-mode" and "regulator-mode" are:
 	1: Normal regulator voltage output mode.
 	3: Low Power which reduces the quiescent current down to only 1uA
 
-The list of valid modes are defined in the dt-bindings/clock/maxim,max77802.h
+The valid modes list is defined in the dt-bindings/regulator/maxim,max77802.h
 header and can be included by device tree source files.
 
 The standard "regulator-mode" property can only be used for regulators that