Add PrintfLog structure.
Add PrintfLog structure.

Contributor: Junyan He <8f73a735c668918c9613b750d3a88ebf2489599f@linux.intel.com>
Signed-off-by: Yan Wang <8ca54580088a7ffe1dd243d1c16c6d1f04463d55@linux.intel.com>
Reviewed-by: Yan Wang <8ca54580088a7ffe1dd243d1c16c6d1f04463d55@linux.intel.com>
Reviewed-by: Junyan He <8f73a735c668918c9613b750d3a88ebf2489599f@linux.intel.com>

wdv4758h/beignet,wdv4758h/beignet,wdv4758h/beignet,wdv4758h/beignet,wdv4758h/beignet