drm/exynos: mixer: drop driver owner initialization

Core in platform_driver_register() already sets the .owner, so driver
does not need to. Whatever is set here will be anyway overwritten by
main driver calling platform_driver_register().

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Inki Dae <[e-mail]>

drivers/gpu/drm/exynos/exynos_mixer.c

···
 struct platform_driver mixer_driver = {
 	.driver = {
 		.name = "exynos-mixer",
-		.owner = THIS_MODULE,
 		.pm = &exynos_mixer_pm_ops,
 		.of_match_table = mixer_match_types,
 	},