qcacld-3.0: Modify check to select channel switch announcement method

In api sch_set_fixed_beacon_fields(), the channel switch announcement
method selection was based on config "CONFIG_CHANNEL_HOPPING_ALL_BANDS"
due to which peer STA may not be able to switch channel when MTP
is working as SAP and doing channel switching.

Modify the check in order to select the channel switch method based
on nature of peer STA and operating/target frequency.

Change-Id: I3deb09245496d65e6bb3ec27ed7eefd3dcaa27bc
CRs-Fixed: 3293983