dt-bindings: pinctrl: qcom: Fix typo abitrary

Fix comment typo.
s/abitrary/arbitrary/
Signed-off-by: Naoki Hayama <naoki.hayama@lineo.co.jp>
Link: https://lore.kernel.org/r/7d1856e2-84c7-ab19-863d-2d500569d58c@lineo.co.jpSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/pinctrl/qcom,ipq4019-pinctrl.txt

@@ -26,7 +26,7 @@ Please refer to pinctrl-bindings.txt in this directory for details of the
 common pinctrl bindings used by client devices, including the meaning of the
 phrase "pin configuration node".
 
-The pin configuration nodes act as a container for an abitrary number of
+The pin configuration nodes act as a container for an arbitrary number of
 subnodes. Each of these subnodes represents some desired configuration for a
 pin, a group, or a list of pins or groups. This configuration can include the
 mux function to select on those pin(s)/group(s), and various pin configuration