dt-bindings: net: dsa: microchip: Add KSZ8895/KSZ8864 switch support

KSZ8895/KSZ8864 is a switch family developed before KSZ8795 and after
KSZ8863, so it shares some registers and functions in those switches.
KSZ8895 has 5 ports and so is more similar to KSZ8795.

KSZ8864 is a 4-port version of KSZ8895.  The first port is removed
while port 5 remains as a host port.
Signed-off-by: Tristram Ha <tristram.ha@microchip.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/BYAPR11MB3558FD0717772263FAD86846EC8B2@BYAPR11MB3558.namprd11.prod.outlook.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml

@@ -22,7 +22,9 @@ properties:
       - microchip,ksz8794
       - microchip,ksz8795
       - microchip,ksz8863
+      - microchip,ksz8864  # 4-port version of KSZ8895 family switch
       - microchip,ksz8873
+      - microchip,ksz8895  # 5-port version of KSZ8895 family switch
       - microchip,ksz9477
       - microchip,ksz9897
       - microchip,ksz9896