soc: mediatek: mmsys: add comp OVL_2L2/POSTMASK/RDMA4

This patch add some more ddp component
OVL_2L2 is ovl which include 2 layers overlay
POSTMASK control round corner for display frame
RDMA4 read dma buffer

Signed-off-by: Yongqiang Niu <[e-mail]>
Reviewed-by: Chun-Kuang Hu <[e-mail]>
Reviewed-by: Enric Balletbo i Serra <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Matthias Brugger <[e-mail]>

include/linux/soc/mediatek/mtk-mmsys.h

···
 	DDP_COMPONENT_OVL0,
 	DDP_COMPONENT_OVL_2L0,
 	DDP_COMPONENT_OVL_2L1,
+	DDP_COMPONENT_OVL_2L2,
 	DDP_COMPONENT_OVL1,
+	DDP_COMPONENT_POSTMASK0,
 	DDP_COMPONENT_PWM0,
 	DDP_COMPONENT_PWM1,
 	DDP_COMPONENT_PWM2,
 	DDP_COMPONENT_RDMA0,
 	DDP_COMPONENT_RDMA1,
 	DDP_COMPONENT_RDMA2,
+	DDP_COMPONENT_RDMA4,
 	DDP_COMPONENT_UFOE,
 	DDP_COMPONENT_WDMA0,
 	DDP_COMPONENT_WDMA1,