drm/sun4i: Enable DRM InfoFrame support on H6

This patch enables Dynamic Range and Mastering InfoFrame on H6.

Cc: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/HE1PR06MB40119DBC0DAE7BA251DF7074AC9B0@HE1PR06MB4011.eurprd06.prod.outlook.com