scsi: devicetree: bindings: hisi_sas: add hip07 support

Add support for hip07 chipset to hisi_sas controller.

Chipset hip07 has v2 hw.
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Documentation/devicetree/bindings/scsi/hisilicon-sas.txt

@@ -6,6 +6,7 @@ Main node required properties:
   - compatible : value should be as follows:
 	(a) "hisilicon,hip05-sas-v1" for v1 hw in hip05 chipset
 	(b) "hisilicon,hip06-sas-v2" for v2 hw in hip06 chipset
+	(c) "hisilicon,hip07-sas-v2" for v2 hw in hip07 chipset
   - sas-addr : array of 8 bytes for host SAS address
   - reg : Address and length of the SAS register
   - hisilicon,sas-syscon: phandle of syscon used for sas control