node_device: fix libvirt build if WITH_HAL is defined

commit ffc40b63 changed uniond _virNodeDevCapData into a typedef
named virNodeDevCapData with a struct that contains the union as well
as a type enum. This change necessitated changing every reference to
"caps->type" into "caps->data.type", but the author of that patch
failed to test a build "WITH_HAL". This patch fixes the one place in
the hal backend that needed changing.

src/node_device/node_device_hal.c

@@ -372,7 +372,7 @@ gather_capability(LibHalContext *ctx, const char *udi,
         virNodeDevCapsDefPtr caps;
         if (VIR_ALLOC(caps) < 0)
             return ENOMEM;
-        caps->type = entry->type;
+        caps->data.type = entry->type;
         if (entry->gather_fn) {
             int rv = (*entry->gather_fn)(ctx, udi, &caps->data);
             if (rv != 0) {