dt: Use compatible string for BCM2711 DSI1

raspberrypi inclusion
category: feature
bugzilla: 50432

--------------------------------

Updates the compatible string for DSI1 on BCM2711 to
differentiate it from BCM2835.
Signed-off-by: NDave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: NFang Yafen <yafen@iscas.ac.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

arch/arm/boot/dts/bcm2711.dtsi

@@ -554,6 +554,7 @@
 
 &dsi1 {
 	interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>;
+	compatible = "brcm,bcm2711-dsi1";
 };
 
 &gpio {