RPI: Add entry for Raspberry Pi 4 model B

The Raspebrry Pi 4 uses the new revision code scheme as documented by
the foundation. This change adds an entry for this board as well.

Signed-off-by: Andrei Gherzan <andrei@balena.io>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
diff --git a/board/raspberrypi/rpi/rpi.c b/board/raspberrypi/rpi/rpi.c
index 7a6ca8f..b57df21 100644
--- a/board/raspberrypi/rpi/rpi.c
+++ b/board/raspberrypi/rpi/rpi.c
@@ -148,6 +148,11 @@
 		DTB_DIR "bcm2837-rpi-cm3.dtb",
 		false,
 	},
+	[0x11] = {
+		"4 Model B",
+		DTB_DIR "bcm2711-rpi-4-b.dtb",
+		true,
+	},
 };
 
 static const struct rpi_model rpi_models_old_scheme[] = {