drm: rcar-du: lvds: Set LVEN and LVRES bits together on D3

drm: rcar-du: lvds: Set LVEN and LVRES bits together on D3

[ Upstream commit 00d082cc4ea6e42ec4fed832a1020231bb1ca150 ]

On the D3 SoC the LVDS PHY must be enabled in the same register write
that enables the LVDS output. Skip writing the LVEN bit independently
on that platform, it will be set by the write that sets LVRES.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>