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>