staging: most: dim2: update renesas compatible string

Use "renesas,rcar-gen3-mlp" instead of "rcar,medialb-dim2"
- the documented vendor prefix for Renesas is "renesas,"
- existing r-car devices use "rcar-genN-XXX" pattern.

There are currently no in-tree users to update.

Signed-off-by: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
Link: https://lore.kernel.org/r/20211226082530.2245198-2-nikita.yoush@cogentembedded.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/most/dim2/dim2.c

@@ -1086,7 +1086,7 @@ static const struct of_device_id dim2_of_match[] = {
 		.data = plat_data + RCAR_H2
 	},
 	{
-		.compatible = "rcar,medialb-dim2",
+		.compatible = "renesas,rcar-gen3-mlp",
 		.data = plat_data + RCAR_M3
 	},
 	{