ARM: dts: exynos: correct HDMI phy compatible in Exynos4

The HDMI phy compatible was missing vendor prefix.

Fixes: ed80d4ca ("ARM: dts: add hdmi related nodes for exynos4 SoCs")
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20230125094513.155063-1-krzysztof.kozlowski@linaro.org


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>