drm/mediatek: Remove mt8192 display rdma compatible

The compatible “mediatek,mt8192-disp-rdma” is being used for reading
the data into DMA for back-end panel driver in mt8192 but there is
no difference between mt8183 and mt8192 in rdma driver.

Remove compatible “mediatek,mt8192-disp-rdma” from the driver and
should use “mediatek,mt8183-disp-rdma” as fallback in 8192 DTS
according to the mediatek,rdma.yaml.

Signed-off-by: Allen-KH Cheng <[e-mail]>
Reviewed-by: Chen-Yu Tsai <[e-mail]>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/[e-mail]/
Signed-off-by: Chun-Kuang Hu <[e-mail]>

drivers/gpu/drm/mediatek/mtk_disp_rdma.c

···
 	.fifo_size = 5 * SZ_1K,
 };
 
-static const struct mtk_disp_rdma_data mt8192_rdma_driver_data = {
-	.fifo_size = 5 * SZ_1K,
-};
-
 static const struct mtk_disp_rdma_data mt8195_rdma_driver_data = {
 	.fifo_size = 1920,
 };
···
 	  .data = &mt8173_rdma_driver_data},
 	{ .compatible = "mediatek,mt8183-disp-rdma",
 	  .data = &mt8183_rdma_driver_data},
-	{ .compatible = "mediatek,mt8192-disp-rdma",
-	  .data = &mt8192_rdma_driver_data},
 	{ .compatible = "mediatek,mt8195-disp-rdma",
 	  .data = &mt8195_rdma_driver_data},
 	{},

drivers/gpu/drm/mediatek/mtk_drm_drv.c

···
 	  .data = (void *)MTK_DISP_RDMA },
 	{ .compatible = "mediatek,mt8183-disp-rdma",
 	  .data = (void *)MTK_DISP_RDMA },
-	{ .compatible = "mediatek,mt8192-disp-rdma",
-	  .data = (void *)MTK_DISP_RDMA },
 	{ .compatible = "mediatek,mt8195-disp-rdma",
 	  .data = (void *)MTK_DISP_RDMA },
 	{ .compatible = "mediatek,mt8173-disp-ufoe",