Mark QCA vendor command id 53 reserved, but not used anymore

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

src/common/qca-vendor.h

@@ -132,7 +132,7 @@ enum qca_nl80211_vendor_subcmds {
 	QCA_NL80211_VENDOR_SUBCMD_KEY_MGMT_SET_KEY = 50,
 	QCA_NL80211_VENDOR_SUBCMD_KEY_MGMT_ROAM_AUTH = 51,
 	QCA_NL80211_VENDOR_SUBCMD_APFIND = 52,
-	/* 53 - reserved for QCA */
+	/* 53 - reserved - was used by QCA, but not in use anymore */
 	QCA_NL80211_VENDOR_SUBCMD_DO_ACS = 54,
 	QCA_NL80211_VENDOR_SUBCMD_GET_FEATURES = 55,
 	QCA_NL80211_VENDOR_SUBCMD_DFS_OFFLOAD_CAC_STARTED = 56,