media: platform: mtk-mdp3: Add missing MT8188 compatible to comp_dt_ids

Commit 4a81656c8eaa ("arm64: dts: mediatek: mt8188: Address binding
warnings for MDP3 nodes") caused a regression on the MDP functionality
when it removed the MT8195 compatibles from the MDP3 nodes, since the
MT8188 compatible was not yet listed as a possible MDP component
compatible in mdp_comp_dt_ids. This resulted in an empty output
bitstream when using the MDP from userspace, as well as the following
errors:

mtk-mdp3 14001000.dma-controller: Uninit component inner id 4
mtk-mdp3 14001000.dma-controller: mdp_path_ctx_init error 0
mtk-mdp3 14001000.dma-controller: CMDQ sendtask failed: -22

Add the missing compatible to the array to restore functionality.

Fixes: 4a81656c8eaa ("arm64: dts: mediatek: mt8188: Address binding warnings for MDP3 nodes")
Cc: [e-mail]
Signed-off-by: Nícolas F. R. A. Prado <[e-mail]>
Signed-off-by: Nicolas Dufresne <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>

drivers/media/platform/mediatek/mdp3/mtk-mdp3-comp.c

···
 	}, {
 		.compatible = "mediatek,mt8195-mdp3-tcc",
 		.data = (void *)MDP_COMP_TYPE_TCC,
+	}, {
+		.compatible = "mediatek,mt8188-mdp3-rdma",
+		.data = (void *)MDP_COMP_TYPE_RDMA,
 	},
 	{}
 };