vDPA: add missing MODULE_DESCRIPTION() macros

With ARCH=x86, make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/vdpa/vdpa.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/vdpa/ifcvf/ifcvf.o

Add the missing invocations of the MODULE_DESCRIPTION() macro.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Message-Id: <20240611-md-drivers-vdpa-v1-1-efaf2de15152@quicinc.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

drivers/vdpa/ifcvf/ifcvf_main.c

@@ -894,4 +894,5 @@ static struct pci_driver ifcvf_driver = {
 
 module_pci_driver(ifcvf_driver);
 
+MODULE_DESCRIPTION("Intel IFC VF NIC driver for virtio dataplane offloading");
 MODULE_LICENSE("GPL v2");

drivers/vdpa/vdpa.c

@@ -1538,4 +1538,5 @@ core_initcall(vdpa_init);
 module_exit(vdpa_exit);
 
 MODULE_AUTHOR("Jason Wang <jasowang@redhat.com>");
+MODULE_DESCRIPTION("vDPA bus");
 MODULE_LICENSE("GPL v2");