net: wireless: bcmdhd: turn on clock for sdio memory dump

1) bug : 22450727
2) currently memory dump is failed when the device is associated.
 we need to turn on HT CLOCK when we issue memory dump.

Change-Id: I034303ae147c71375fb672a779232dae0786c110
Signed-off-by: Ecco Park <eccopark@broadcom.com>