qcacmn: Populate LTF size for Rx stats

Populate LTF size value from TLV for HE and modify
HE_LTF enum value to match with Firmware values

Change-Id: I8e5cce31cbae4aa8722050b06d89c933b74aa752

qdf/inc/qdf_nbuf.h

@@ -299,6 +299,7 @@ struct mon_rx_status {
 	uint8_t monitor_direct_used;
 	uint8_t data_sequence_control_info_valid;
 	uint16_t first_data_seq_ctrl;
+	uint8_t ltf_size;
 };
 
 /**