lib: Adjust refactored gpu_fill library to our coding style

While I am making changes in gpgpu and media fill area let's
adjust code to our coding style.

v2: rebased on series new version (patch is now last from
series so change seems larger)
v3: rebased

Signed-off-by: Katarzyna Dec <katarzyna.dec@intel.com>
Cc: Lukasz Kalamarz <lukasz.kalamarz@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Radoslaw Szwichtenberg <radoslaw.szwichtenberg@intel.com>
6 files changed