dt-bindings: gpio: pca9570: Add compatible for slg7xl45106

This patch adds compatible string for the SLG7XL45106,
I2C GPO expander.
Acked-by: NKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: NShubhrajyoti Datta <shubhrajyoti.datta@amd.com>
Signed-off-by: NBartosz Golaszewski <bartosz.golaszewski@linaro.org>

Documentation/devicetree/bindings/gpio/gpio-pca9570.yaml

@@ -12,6 +12,7 @@ maintainers:
 properties:
   compatible:
     enum:
+      - dlg,slg7xl45106
       - nxp,pca9570
       - nxp,pca9571