qcacmn: add QCA_WLAN_VENDOR_ATTR_LL_STATS_IFACE_NF_CAL_VAL

Add QCA_WLAN_VENDOR_ATTR_LL_STATS_IFACE_NF_CAL_VAL attribute
for noise floor calibration value.

Change-Id: Ie20ce40c0b925fd95cdcb127877e32a0b28b1fc2
CRs-Fixed: 3427750

os_if/linux/qca_vendor.h

@@ -2607,6 +2607,11 @@ enum qca_wlan_vendor_attr_ll_stats_results {
 	 */
 	QCA_WLAN_VENDOR_ATTR_LL_STATS_TIM_BEACON_ERR = 89,
 
+	/* Signed 32 bit value. It represents the noise floor calibration value.
+	 * Possible values are -120~-50 dBm.
+	 */
+	QCA_WLAN_VENDOR_ATTR_LL_STATS_IFACE_NF_CAL_VAL = 90,
+
 	/* keep last */
 	QCA_WLAN_VENDOR_ATTR_LL_STATS_AFTER_LAST,
 	QCA_WLAN_VENDOR_ATTR_LL_STATS_MAX =