qcacmn: Add flag for Multi VDEV restart synchronization
In current code, channel number is checked to enable multivdev restart
synchronization, this assumption is not valid as channel width change
can also be requested.
To fix this, used a flag to enable multivdev restart synchronization.
Change-Id: I2633ee42ae7d8c127d8369f36f14e861431a21cc
CRs-Fixed: 2400987