arm64: dts: mt8183: rename rdma fifo size

property name must include only lowercase and '-'

Fixes: 91f9c963 ("arm64: dts: mt8183: Add display nodes for MT8183")
Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Link: https://lore.kernel.org/r/20210128112314.1304160-2-hsinyi@chromium.orgSigned-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt8183.dtsi

@@ -1011,7 +1011,7 @@ rdma0: rdma@1400b000 {
 			clocks = <&mmsys CLK_MM_DISP_RDMA0>;
 			iommus = <&iommu M4U_PORT_DISP_RDMA0>;
 			mediatek,larb = <&larb0>;
-			mediatek,rdma_fifo_size = <5120>;
+			mediatek,rdma-fifo-size = <5120>;
 			mediatek,gce-client-reg = <&gce SUBSYS_1400XXXX 0xb000 0x1000>;
 		};
 
@@ -1023,7 +1023,7 @@ rdma1: rdma@1400c000 {
 			clocks = <&mmsys CLK_MM_DISP_RDMA1>;
 			iommus = <&iommu M4U_PORT_DISP_RDMA1>;
 			mediatek,larb = <&larb0>;
-			mediatek,rdma_fifo_size = <2048>;
+			mediatek,rdma-fifo-size = <2048>;
 			mediatek,gce-client-reg = <&gce SUBSYS_1400XXXX 0xc000 0x1000>;
 		};