Documentation: mfd: s2mps11: Document support for S2MPS14

Add bindings documentation for S2MPS14 device to the s2mps11 driver.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Tomasz Figa <t.figa@samsung.com>
Cc: devicetree@vger.kernel.org
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Acked-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

Documentation/devicetree/bindings/mfd/s2mps11.txt

 
-* Samsung S2MPS11 Voltage and Current Regulator
+* Samsung S2MPS11 and S2MPS14 Voltage and Current Regulator
 
 The Samsung S2MPS11 is a multi-function device which includes voltage and
 current regulators, RTC, charger controller and other sub-blocks. It is
@@ -7,7 +7,7 @@ interfaced to the host controller using an I2C interface. Each sub-block is
 addressed by the host system using different I2C slave addresses.
 
 Required properties:
-- compatible: Should be "samsung,s2mps11-pmic".
+- compatible: Should be "samsung,s2mps11-pmic" or "samsung,s2mps14-pmic".
 - reg: Specifies the I2C slave address of the pmic block. It should be 0x66.
 
 Optional properties:
@@ -59,10 +59,14 @@ supports. Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number
 as per the datasheet of s2mps11.
 
 	- LDOn
-		  - valid values for n are 1 to 38
+		  - valid values for n are:
+			- S2MPS11: 1 to 38
+			- S2MPS14: 1 to 25
 		  - Example: LDO1, LD02, LDO28
 	- BUCKn
-		  - valid values for n are 1 to 10.
+		  - valid values for n are:
+			- S2MPS11: 1 to 10
+			- S2MPS14: 1 to 5
 		  - Example: BUCK1, BUCK2, BUCK9
 
 Example: