dt-bindings: mmc: samsung,exynos-dw-mshc: add exynos7870 support

Document the compatibles for Exynos7870's DW MMC driver, for both
non-SMU and SMU variants.

Signed-off-by: Kaustabh Chakraborty <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Ulf Hansson <[email protected]>

Author: Kaustabh Chakraborty

Documentation/devicetree/bindings/mmc/samsung,exynos-dw-mshc.yaml

@@ -24,6 +24,8 @@ properties:
           - samsung,exynos5420-dw-mshc-smu
           - samsung,exynos7-dw-mshc
           - samsung,exynos7-dw-mshc-smu
+          - samsung,exynos7870-dw-mshc
+          - samsung,exynos7870-dw-mshc-smu
       - items:
           - enum:
               - samsung,exynos5433-dw-mshc-smu