The driver's  runtime_suspend/resume functions just disable/enable
the clock which is already being managed at AMBA bus level
runtime_suspend/resume functions.

Hence, remove the driver's runtime_suspend/resume functions.
Signed-off-by: NInderpal Singh <inderpal.singh@linaro.org>
Tested-by: NChander Kashyap <chander.kashyap@linaro.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>