qcacld-3.0: Retain the max_chan_switch_ie support ini config
Max channel switch IE is getting enabled through the ini config.
This is getting lost while copying the phy_config.
As there is no additional target support required for enabling
this IE, retain the config received through ini.
Change-Id: Ic200d8e92346e6c3fba2bca9f1776aee2b106ae4
CRs-Fixed: 3086447