qcacld-3.0: Update default band to include all bands

Currently, QCA_SETBAND_AUTO is backwards compatible, so it is set
to include only 2G and 5G bands. Update this to include 6G bands
as well. Also update the band capability INI to have the default
value 0 include 6G bands.

Change-Id: I98067c18e939ff4c1e7b1e778b020b44409b5b34
CRs-fixed: 2799883

components/mlme/dispatcher/inc/cfg_mlme_generic.h

@@ -140,7 +140,7 @@
 
 /*
  * <ini>
- * BandCapability - Preferred band (0: Both 2.4G and 5G,
+ * BandCapability - Preferred band (0: 2.4G, 5G, and 6G,
  *				    1: 2.4G only,
  *				    2: 5G only,
  *				    3: Both 2.4G and 5G,