atomisp: use GFP_KERNEL on CTP when ISP allocates memory

atomisp: use GFP_KERNEL on CTP when ISP allocates memory

BZ: 27472

On CTP platform, ISP easily runs out of memory. Use GFP flags on
allocation on CTP which allow kernel to wait for other drivers to free
up memory before failing.

Change-Id: I4f12ccfd85f7318db92b199daffe115c8789621e
Signed-off-by: Tuukka Toivonen <tuukka.toivonen@intel.com>
Reviewed-on: http://android.intel.com:8080/40731
Reviewed-by: Cohen, David A <david.a.cohen@intel.com>
Tested-by: Koski, Anttu <anttu.koski@intel.com>
Reviewed-by: Laakso, Antti <antti.laakso@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>