drm: rcar-du: lvds: Add R-Car Gen3 support

The LVDS encoder differs slightly in Gen3 SoCs in its PLL configuration.
Add support for the Gen3 LVDS PLL parameters and startup procedure.

Signed-off-by: Koji Matsuoka <koji.matsuoka.xm@renesas.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

drivers/gpu/drm/rcar-du/Kconfig

@@ -21,10 +21,8 @@ config DRM_RCAR_HDMI
 config DRM_RCAR_LVDS
 	bool "R-Car DU LVDS Encoder Support"
 	depends on DRM_RCAR_DU
-	depends on ARCH_R8A7790 || ARCH_R8A7791 || COMPILE_TEST
 	help
-	  Enable support for the R-Car Display Unit embedded LVDS encoders
-	  (currently only on R8A7790 and R8A7791).
+	  Enable support for the R-Car Display Unit embedded LVDS encoders.
 
 config DRM_RCAR_VSP
 	bool "R-Car DU VSP Compositor Support"