wlan: Revert the check to allow 32 STA + 1 Creator in IBSS

Revert the change which allow 32 STA + 1 Creator as
requirement is 31 STA + 1 Creator.

Change-Id: I20d703eaaeceaa14a03c7a788bf2fa5178d47b7c
CRs-Fixed: 652235
wlan: DUT Transmit power stuck at 6dbm

If local transmit power recieved as 0dbm then host is sending
0dbm as max Tx power to firmware which causing Tx power
to stuck at 6dbm.

To avoid sending 0dbm to firmware added a additional check
to take care of local power constraint value recieved as 0dbm.

Change-Id: Ie3ec43f8748108e1cad4172cceb51822367e59d1
CRs-Fixed: 648752
wlan: Revision 3.2.3.305

Revision 3.2.3.305

Change-Id: Ice4e477e8cdad3ea1191e1a22bd183ed95d4ea44