soc/intel/common/block: Rename IPU ACPI device

IMGU->IPU0 to align with other SoC IPU entires.

TEST=Dump and disassemble DSDT on poppy, verify IPU0 device
present there.

Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Change-Id: I803c01f9156a56dbd903b6ba7897cc0f96b0a26a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45976
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/src/soc/intel/common/block/acpi/acpi/ipu.asl b/src/soc/intel/common/block/acpi/acpi/ipu.asl
index 2380964..ba1d9af 100644
--- a/src/soc/intel/common/block/acpi/acpi/ipu.asl
+++ b/src/soc/intel/common/block/acpi/acpi/ipu.asl
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-/* IPU3 input system - Device 05, Function 0 */
-Device (IMGU)
+/* Imaging Unit - Device 05, Function 0 */
+Device (IPU0)
 {
 	Name (_ADR, 0x00050000)
 	Name (_DDN, "Imaging Unit")