regulator: mcp16502-regulator: fix spelling mistake

Signed-off-by: Michael Klein <michael@fossekall.de>
Link: https://lore.kernel.org/r/20201124183730.2250690-2-michael@fossekall.deSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/regulator/mcp16502-regulator.txt

@@ -10,7 +10,7 @@ Required properties:
               name. The content of each sub-node is defined by the
               standard binding for regulators; see regulator.txt.
 
-Regualtors of MCP16502 PMIC:
+Regulators of MCP16502 PMIC:
 1) VDD_IO	- Buck (1.2 - 3.7 V)
 2) VDD_DDR	- Buck (0.6 - 1.85 V)
 3) VDD_CORE	- Buck (0.6 - 1.85 V)