qcacmn: Add time slice duty cycle attribute into QCA vendor command

Add a new attribute into qca_wlan_vendor_attr_ll_stats_results to
support getting interface time slicing duty cycle info.

Change-Id: If6a34cd298c1cb41e0e29a24f2336eed76b98329
CRs-Fixed: 3020795

os_if/linux/qca_vendor.h

@@ -2358,6 +2358,10 @@ enum qca_wlan_vendor_attr_ll_stats_results {
 	QCA_WLAN_VENDOR_ATTR_LL_STATS_CHANNEL_RX_TIME = 85,
 	QCA_WLAN_VENDOR_ATTR_LL_STATS_CHANNEL_LOAD_PERCENTAGE = 86,
 
+	/* u8 value representing the time slicing duty cycle percentage.
+	 * Possible values are 0-100.
+	 */
+	QCA_WLAN_VENDOR_ATTR_LL_STATS_IFACE_INFO_TS_DUTY_CYCLE = 87,
 	/* keep last */
 	QCA_WLAN_VENDOR_ATTR_LL_STATS_AFTER_LAST,
 	QCA_WLAN_VENDOR_ATTR_LL_STATS_MAX =