regulator: Fix spelling error in bindings

Minor spell fix, s/intialised/initialised.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/regulator/regulator.txt

@@ -13,7 +13,7 @@ Optional properties:
 - <name>-supply: phandle to the parent supply/regulator node
 - regulator-ramp-delay: ramp delay for regulator(in uV/uS)
   For hardware which supports disabling ramp rate, it should be explicitly
-  intialised to zero (regulator-ramp-delay = <0>) for disabling ramp delay.
+  initialised to zero (regulator-ramp-delay = <0>) for disabling ramp delay.
 - regulator-enable-ramp-delay: The time taken, in microseconds, for the supply
   rail to reach the target voltage, plus/minus whatever tolerance the board
   design requires. This property describes the total system ramp time