qcacld-3.0: cfg ini documentation refine

Some malformed comments were discovered when generating
the official documentation of wlan cfg ini items.

Refine the documentation text of the following items
in one batch:

gEnableDynamicDTIM
g_sap_chanswitch_mode
gVhtChannelWidth
gDataInactivityTimeout

Change-Id: I2b1455d0ea27fd35dc0cf66316c7dc3b348ee0ac
CRs-Fixed: 2416086

components/mlme/dispatcher/inc/cfg_mlme_sap.h

@@ -371,10 +371,18 @@
  * @Max: 1
  * @Default: 1
  *
- * This ini is used to configure channel switch mode
+ * This ini is used to configure the value of channel switch mode, which is
+ * contained in the Channel Switch Announcement(CSA) information element sent
+ * by an SAP.
+ *
+ * 0 - CSA receiving STA doesn't need to do anything
+ * 1 - CSA receiving STA shall not transmit any more frames on the channel
+ *     until the scheduled channel switch occurs
  *
  * Related: none
  *
+ * Supported Feature: SAP
+ *
  * Usage: External
  *
  * </ini>

components/mlme/dispatcher/inc/cfg_mlme_timeout.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011-2018 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2011-2019 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -264,12 +264,13 @@
 
 /*
  * <ini>
- * gDataInactivityTimeout - Data activity timeout for non wow mode.
+ * gDataInactivityTimeout - Data inactivity timeout for non wow mode.
  * @Min: 1
  * @Max: 255
  * @Default: 200
  *
- * This ini is used to set data inactivity timeout in non wow mode.
+ * This ini is used to set data inactivity timeout value, in milliseconds, of
+ * non wow mode.
  *
  * Supported Feature: inactivity timeout in non wow mode
  *

components/mlme/dispatcher/inc/cfg_mlme_vht_caps.h

@@ -217,9 +217,9 @@
  * gVhtChannelWidth - Channel width capability for 11ac
  * @Min: 0
  * @Max: 4
- * @Default: 3
+ * @Default: 2
  *
- * This ini is  used to set channel width capability for 11AC.
+ * This ini is used to set channel width capability for 11AC.
  * eHT_CHANNEL_WIDTH_20MHZ = 0,
  * eHT_CHANNEL_WIDTH_40MHZ = 1,
  * eHT_CHANNEL_WIDTH_80MHZ = 2,

components/pmo/dispatcher/inc/wlan_pmo_common_cfg.h

@@ -121,7 +121,7 @@
  *
  * This ini is used to enable/disable dynamic DTIM.
  *
- * 0 -Disable Dynamic DTIM
+ * 0 - Disable Dynamic DTIM
  * 1 to 5 - SLM will switch to DTIM specified here when host suspends and
  *          switch DTIM1 when host resumes
  *