Documentation: devicetree: bindings: regulator: palmas-pmic.txt

Adding support for the tps659038 pmic so it doesn't generate a warning
when running the patch check script to
Documentation/devicetree/bindings/regulator/palmas-pmic.txt

Adding a note that the tps659037 device is a OTP spin of the
tps659038 pmic and device compatible.

Signed-off-by: Schuyler Patton <spatton@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>