wlantest: Tag and ignore generated packets

Rather than ignoring packets with a minimal 8-byte radiotap
header, which may occur elsewhere, tag generated (decrypted)
packets with an empty vendor namespace tag and ignore those.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

src/common/qca-vendor.h

@@ -18,6 +18,13 @@
 
 #define OUI_QCA 0x001374
 
+/**
+ * enum qca_radiotap_vendor_ids - QCA radiotap vendor namespace IDs
+ */
+enum qca_radiotap_vendor_ids {
+	QCA_RADIOTAP_VID_WLANTEST = 0,
+};
+
 /**
  * enum qca_nl80211_vendor_subcmds - QCA nl80211 vendor command identifiers
  *