Revert "nt-opencl: no branching in coalasced loading loop."

This reverts commit a4f7e0ee458429c848a2e6d744cbbe3d9217d7ad.
Merge branch 'bleeding-jumbo' into bleeding-mask. This is a NO-OP
commit in bleeding-mask, we are only importing history.

* bleeding-jumbo:
  Revert "nt-opencl: no branching in coalasced loading loop."

Conflicts:
	src/opencl/nt_kernel.cl