net: wireless: bcm4329: Increase backplane clk delay.

During suspend/resume wifi chip's power mode is changed and this
impacts chip's internal registers reading/writing. Delaying reads/
writes to wifi chip from HZ/100 to 3*HZ which gives time for chip
to settle its state.

BUG 798783

Change-Id: Ie9c06c2d03fb38b6fba5acca48490d12c358e496
Reviewed-on: http://git-master/r/22150
Reviewed-by: Rahul Bansal <rbansal@nvidia.com>
Tested-by: Rahul Bansal <rbansal@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>