Revert "net: wireless: bcmdhd: Ignore IOCTL during shutdown"

Revert "net: wireless: bcmdhd: Ignore IOCTL during shutdown"

This reverts commit cdd719b7c16df2b4720170b8213ddc2bd8a6bfeb.
Shutdown handler change is reverted, this change is no longer required

bug 200247693

Change-Id: I6ae070f2c375f46329307626ae7f99d33c83114d
Signed-off-by: Manikanta <mmaddireddy@nvidia.com>
Reviewed-on: http://git-master/r/1256449
Reviewed-by: Narayan Reddy <narayanr@nvidia.com>
Reviewed-by: Bhadram Varka <vbhadram@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>