qcacmn: Add enum for baseline radio channel width

Add enum for baseline radio level channel width. This is required for
some low level use cases which need the original width configured into
the radio when channel is configured, rather than per-VDEV protocol
level width which might vary.

Change-Id: I8215003774bc46403a038011e7581517d25b94f9
CRs-Fixed: 2474794

dp/inc/cdp_txrx_stats_struct.h

@@ -1619,6 +1619,8 @@ enum _ol_ath_param_t {
 	OL_ATH_PARAM_TBTT_CTRL = 420,
 	/* Enable/disable AP OBSS_PD_THRESHOLD */
 	OL_ATH_PARAM_SET_CMD_OBSS_PD_THRESHOLD_ENABLE = 421,
+	/* Get baseline radio level channel width */
+	OL_ATH_PARAM_RCHWIDTH = 422,
 };
 #endif
 /* Bitmasks for stats that can block */