mb/emulation: Remove fake devicetree.cb components

Change-Id: I31853e3ede786eb9e10704674e42dd56c3a48688
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41717
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Philipp Hug <philipp@hug.cx>

src/mainboard/emulation/qemu-aarch64/devicetree.cb

@@ -1,6 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 
-# This file exists only to avoid a compile error. It needs a devicetree.cb that is not empty.
+chip mainboard/emulation/qemu-aarch64
-chip drivers/generic/generic # I2C0 controller
+	device cpu_cluster 0 on end
-	device i2c 6 on end # Fake component for testing
 end

src/mainboard/emulation/qemu-aarch64/mainboard.c

@@ -27,3 +27,5 @@ struct chip_operations mainboard_ops = {
 	.name = "qemu_aarch64",
 	.enable_dev = mainboard_enable,
 };
+
+struct chip_operations mainboard_emulation_qemu_aarch64_ops = { };

src/mainboard/emulation/qemu-armv7/devicetree.cb

@@ -2,7 +2,5 @@
 
 # TODO fill with Versatile Express board data in QEMU.
 chip cpu/armltd/cortex-a9
-	chip drivers/generic/generic # I2C0 controller
+	device cpu_cluster 0 on end
-		device i2c 6 on end # Fake component for testing
-	end
 end

src/mainboard/emulation/qemu-riscv/devicetree.cb

@@ -2,7 +2,4 @@
 
 chip soc/ucb/riscv
 	device cpu_cluster 0 on end
-	chip drivers/generic/generic # I2C0 controller
-		device i2c 6 on end # Fake component for testing
-	end
 end

src/mainboard/emulation/spike-riscv/devicetree.cb

@@ -2,7 +2,4 @@
 
 chip soc/ucb/riscv
 	device cpu_cluster 0 on end
-	chip drivers/generic/generic # I2C0 controller
-		device i2c 6 on end # Fake component for testing
-	end
 end