lib: virtio: fix zephyr build warning

Building the samples/subsys/ipc/openamp_rsc_table/ sample generates the
following warning:

[24/182] Building C object zephyr/CMakeFiles/zephyr.dir/lib/open-amp/resource_table.c.obj
In file included from /zephyrproject/zephyr/lib/open-amp/./resource_table.h:11,
                 from /zephyrproject/zephyr/lib/open-amp/resource_table.c:30:
/zephyrproject/modules/lib/open-amp/open-amp/lib/include/openamp/virtio.h:83:2:
 warning: #warning "VIRTIO_DRIVER_SUPPORT and/or VIRTIO_DEVICE_SUPPORT should be defined" [-Wcpp]
   83 | #warning "VIRTIO_DRIVER_SUPPORT and/or VIRTIO_DEVICE_SUPPORT should be defined"
      |  ^~~~~~~

The issue occurs because the project includes the virtio API while
VIRTIO_DRIVER_SUPPORT and VIRTIO_DEVICE_SUPPORT is only defined for
the open-amp library build.

Fix the warning by testing deprecated usage of VIRTIO_DRIVER_ONLY and
VIRTIO_DEVICE_ONLY but not under
#if !defined(VIRTIO_DRIVER_SUPPORT) && !defined(VIRTIO_DEVICE_SUPPORT)
condition.

Signed-off-by: Arnaud Pouliquen <[email protected]>

lib/include/openamp/virtio.h

@@ -70,21 +70,17 @@ extern "C" {
 #define VIRTIO_DEV_DRIVER	0UL
 #define VIRTIO_DEV_DEVICE	1UL
 
-#if !defined(VIRTIO_DRIVER_SUPPORT) && !defined(VIRTIO_DEVICE_SUPPORT)
 #ifdef VIRTIO_DRIVER_ONLY
 #warning "VIRTIO_DRIVER_ONLY is deprecated, please use VIRTIO_DEVICE_SUPPORT=0"
 #define VIRTIO_DRIVER_SUPPORT 1
 #define VIRTIO_DEVICE_SUPPORT 0
-#elif VIRTIO_DEVICE_ONLY
+#endif /* VIRTIO_DRIVER_ONLY */
+
+#ifdef VIRTIO_DEVICE_ONLY
 #warning "VIRTIO_DEVICE_ONLY is deprecated, please use VIRTIO_DRIVER_SUPPORT=0"
 #define VIRTIO_DRIVER_SUPPORT 0
 #define VIRTIO_DEVICE_SUPPORT 1
-#else
-#warning "VIRTIO_DRIVER_SUPPORT and/or VIRTIO_DEVICE_SUPPORT should be defined"
-#define VIRTIO_DRIVER_SUPPORT 1
-#define VIRTIO_DEVICE_SUPPORT 1
-#endif /* VIRTIO_DRIVER_ONLY */
-#endif /*!defined(VIRTIO_DRIVER_SUPPORT) && !defined(VIRTIO_DEVICE_SUPPORT)*/
+#endif /* VIRTIO_DEVICE_ONLY */
 
 #define VIRTIO_ENABLED(option) (option == 1)