[PORT FROM R2] mrst.c: not power opt fail when GP_CAMERA_0_POWER_DOWN not available

[PORT FROM R2] mrst.c: not power opt fail when GP_CAMERA_0_POWER_DOWN not available

BZ: 18089

On PR3, the GP_CORE_013 is not a connected pin but it is connected to
CAM_STBY_CTRL ON PR2. And it has been requested to remove it from PR3
SFI table as this GPIO Should not modified bu kernel from its original
state(GPIO input 20k Pull dow)

so this patch rework the mt9e013_power_ctrl: ipc_msic_vprog programming
is down whatever result of camera_sensor_gpio(GP_CAMERA_0_POWER_DOWN).
And calls to gpio_set_value() should depend on result of camera_sensor_gpio()

Change-Id: I9a44bdaf5a60d836ddeeac39175930b8cbc97f3f
Orig-Change-Id: I92ae6bdb9655b63233f10a4ad9aa5b216d484637
Signed-off-by: Tao Jing <jing.tao@intel.com>
Reviewed-on: http://android.intel.com:8080/29595
Reviewed-by: Lampila, KalleX <kallex.lampila@intel.com>
Reviewed-by: Koski, Anttu <anttu.koski@intel.com>
Tested-by: Koski, Anttu <anttu.koski@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>