phy: exynos-mipi-video: correct cam0 sysreg property name for exynos7870

Fix the cam0 sysreg property name (samsung,cam0-sysreg), which has been
erroneously declared as samsung,cam-sysreg. This follows the same name
used in Exynos5433 PHY.

Fixes: 543f5e3 ("phy: exynos-mipi-video: introduce support for exynos7870")
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Kaustabh Chakraborty <kauschluss@disroot.org>
Link: https://lore.kernel.org/r/20250710-exynos7870-mipi-phy-fix-v2-1-5cf50d69c9d7@disroot.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Author: Kaustabh Chakraborty

drivers/phy/samsung/phy-exynos-mipi-video.c

@@ -218,7 +218,7 @@ static const struct mipi_phy_device_desc exynos7870_mipi_phy = {
 	.regmap_names = {
 		"samsung,pmu-syscon",
 		"samsung,disp-sysreg",
-		"samsung,cam-sysreg"
+		"samsung,cam0-sysreg"
 	},
 	.num_phys = 4,
 	.phys = {