fix serial console, when virtio is used f.e. sparc64 qemu

target/config/Config.in.qemuopts

@@ -96,6 +96,7 @@ config ADK_TARGET_QEMU_WITH_VIRTIO
 	select ADK_KERNEL_VIRTIO_PCI
 	select ADK_KERNEL_VIRTIO_NET
 	select ADK_KERNEL_VIRTIO_BLK
+	select ADK_KERNEL_VIRTIO_CONSOLE
 
 endchoice
 

target/linux/config/Config.in.virtio

@@ -3,6 +3,9 @@ menu "Virtio driver support"
 config ADK_KERNEL_VIRTIO
 	boolean
 
+config ADK_KERNEL_VIRTIO_CONSOLE
+	boolean
+
 config ADK_KERNEL_VIRTIO_PCI
 	boolean