Helper functions used by decoder back-ends to allocate
physically contiguous memory required by hardware video
decoder.
Acked-by: NPeter Griffin <peter.griffin@linaro.org>
Signed-off-by: NHugues Fruchet <hugues.fruchet@st.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>