gralloc: Add missing GRALLOC_USAGE_HW_FIMC1 logic

This caused the ION pointer to get clobbered with a UMP
pointer when FIMC1 memory was requested.

After a while, camera would be unable to allocate buffers
due to ION memory not being freed properly.

Change-Id: I1ba1d27da924a0bb81631548e83c7f3e5789f319