dt-bindings: mfd: syscon: Add ti,am625-dss-oldi-io-ctrl compatible

Add TI DSS OLDI-IO control registers compatible for AM625 DSS. This is a
region of 10 32bit registers found in the TI AM625 CTRL_MMR0 register
space[0]. They are used to control the characteristics of the OLDI
DATA/CLK IO as needed by the OLDI TXes controller node.

[0]: https://www.ti.com/lit/pdf/spruiv7Signed-off-by: Aradhya Bhatia <a-bhatia1@ti.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240512143824.1862290-1-a-bhatia1@ti.comSigned-off-by: Lee Jones <lee@kernel.org>

Documentation/devicetree/bindings/mfd/syscon.yaml

@@ -86,6 +86,7 @@ properties:
               - rockchip,rv1126-qos
               - starfive,jh7100-sysmain
               - ti,am62-usb-phy-ctrl
+              - ti,am625-dss-oldi-io-ctrl
               - ti,am62p-cpsw-mac-efuse
               - ti,am654-dss-oldi-io-ctrl
               - ti,j784s4-pcie-ctrl