tests: drivers: build_all: virtio: add VirtIO MMIO build test

Add the `qemu_cortex_a53` configuration to run the build test
for the VirtIO MMIO driver.
To add this test, we have split the virtio-pci and virtio-mmio test cases.

Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@gmail.com>

Author: soburi

tests/drivers/build_all/virtio/boards/qemu_cortex_a53.overlay

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2025 TOKITA Hiroshi
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	chosen {
+		zephyr,entropy = &virtio_entropy;
+	};
+};
+
+&virtio_mmio0 {
+	status = "okay";
+
+	virtio_entropy: virtio_entropy {
+		compatible = "virtio,entropy";
+		status = "okay";
+	};
+};

tests/drivers/build_all/virtio/prj.conf

@@ -1,5 +1,4 @@
 CONFIG_TEST=y
 CONFIG_VIRTIO=y
-CONFIG_PCIE=y
 CONFIG_HEAP_MEM_POOL_SIZE=1024
 CONFIG_ENTROPY_GENERATOR=y

tests/drivers/build_all/virtio/testcase.yaml

@@ -1,8 +1,12 @@
 common:
-  filter: CONFIG_DT_HAS_VIRTIO_PCI_ENABLED
   build_only: true
   tags:
     - drivers
     - virtio
 tests:
-  drivers.virtio_pci.build: {}
+  drivers.virtio_pci.build:
+    extra_configs:
+      - CONFIG_PCIE=y
+    filter: CONFIG_DT_HAS_VIRTIO_PCI_ENABLED
+  drivers.virtio_mmio.build:
+    filter: CONFIG_DT_HAS_VIRTIO_MMIO_ENABLED