dt-bindings: dp83869: Fix the type of device

DP83869 is an Ethernet PHY, not a charger, so fix the documentation
accordingly.

Fixes: 4d66c56f ("dt-bindings: net: dp83869: Add TI dp83869 phy")
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/ti,dp83869.yaml

@@ -24,7 +24,7 @@ description: |
   conversions.  The DP83869HM can also support Bridge Conversion from RGMII to
   SGMII and SGMII to RGMII.
 
-  Specifications about the charger can be found at:
+  Specifications about the Ethernet PHY can be found at:
     http://www.ti.com/lit/ds/symlink/dp83869hm.pdf
 
 properties: