dt-bindings: google,cros-ec-keyb: Fix spelling error

The dependency had an obvious spelling error. Fix it.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230220135531.1987351-1-linus.walleij@linaro.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Documentation/devicetree/bindings/input/google,cros-ec-keyb.yaml

@@ -45,7 +45,7 @@ properties:
       when the keyboard has a custom design for the top row keys.
 
 dependencies:
-  function-row-phsymap: [ 'linux,keymap' ]
+  function-row-physmap: [ 'linux,keymap' ]
   google,needs-ghost-filter: [ 'linux,keymap' ]
 
 required: