GFX-Display: fix PR0 always off

GFX-Display: fix PR0 always off

BZ: 37685

1.for ic_init function change to have return value,
if still as void, when check the resturn status, it will be
turn, then unnecessory reset happen

2. update it return value

Signed-off-by: Ke Ai <ke.ai@intel.com>
Change-Id: Ieb961bf0031608cc44168c985b230e6775fedc4f
Reviewed-on: http://android.intel.com:8080/49671
Reviewed-by: Xu, Randy <randy.xu@intel.com>
Tested-by: Xu, Randy <randy.xu@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>