dt-bindings: ata: fix typo in Allwinner R40 reset specific paragraph

"Property" is misspelled, correct it.

Fixes: caf8975b ("dt-bindings: ata: update ahci_sunxi bindings")
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/ata/ahci-platform.txt

@@ -45,7 +45,7 @@ Required properties when using sub-nodes:
 - #address-cells    : number of cells to encode an address
 - #size-cells       : number of cells representing the size of an address
 
-For allwinner,sun8i-r40-ahci, the reset propertie must be present.
+For allwinner,sun8i-r40-ahci, the reset property must be present.
 
 Sub-nodes required properties:
 - reg		    : the port number