qcacmn: Add support for num of chains configuration nl command

Add support to configure the number of chains over the nl
vendor command
QCA_WLAN_VENDOR_ATTR_CONFIG_NUM_TX_CHAINS
QCA_WLAN_VENDOR_ATTR_CONFIG_NUM_RX_CHAINS.

Change-Id: I81eeda348efe36e03620687e81c082d3869fcd35
CRs-Fixed: 2756676

os_if/linux/qca_vendor.h

@@ -4530,6 +4530,24 @@ enum qca_wlan_vendor_attr_config {
 	 */
 	QCA_WLAN_VENDOR_ATTR_CONFIG_UDP_QOS_UPGRADE = 72,
 
+	/* 8-bit unsigned value. This attribute is used to dynamically configure
+	 * the number of chains to be used for transmitting data. This
+	 * configuration is allowed only when in connected state and will be
+	 * effective until disconnected. The driver rejects this configuration
+	 * if the number of spatial streams being used in the current connection
+	 * cannot be supported by this configuration.
+	 */
+	QCA_WLAN_VENDOR_ATTR_CONFIG_NUM_TX_CHAINS = 73,
+
+	/* 8-bit unsigned value. This attribute is used to dynamically configure
+	 * the number of chains to be used for receiving data. This
+	 * configuration is allowed only when in connected state and will be
+	 * effective until disconnected. The driver rejects this configuration
+	 * if the number of spatial streams being used in the current connection
+	 * cannot be supported by this configuration.
+	 */
+	QCA_WLAN_VENDOR_ATTR_CONFIG_NUM_RX_CHAINS = 74,
+
 	/* keep last */
 	QCA_WLAN_VENDOR_ATTR_CONFIG_AFTER_LAST,
 	QCA_WLAN_VENDOR_ATTR_CONFIG_MAX =