phy: Remove SOC_EXYNOS4212 dep. from PHY_EXYNOS4X12_USB

Exynos4212 support was removed by commit bca9085e ("ARM: dts:
exynos: remove Exynos4212 support (dead code)").

Remove the SOC_EXYNOS4212 dependency from PHY_EXYNOS4X12_USB.

Discovered with the
https://github.com/ulfalizer/Kconfiglib/blob/master/examples/list_undefined.py
script.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

drivers/phy/samsung/Kconfig

@@ -49,7 +49,7 @@ config PHY_EXYNOS4210_USB2
 config PHY_EXYNOS4X12_USB2
 	bool
 	depends on PHY_SAMSUNG_USB2
-	default SOC_EXYNOS3250 || SOC_EXYNOS4212 || SOC_EXYNOS4412
+	default SOC_EXYNOS3250 || SOC_EXYNOS4412
 
 config PHY_EXYNOS5250_USB2
 	bool