check image from buffer's base address alignment.
check image from buffer's base address alignment.

per spec, if create image from USE_HOST_PTR buffer, the buffer's base
address need be aligned.

v2: return error code CL_VALID_IMAGE_FORMAT_DESCRIPTOR.

Signed-off-by: Luo Xionghu <c3dafbeb50547b880155fb36e6f40d38b44f6611@intel.com>
Reviewed-by: Yang Rong <78759e37dc7114caed18f74e7515c5cb519dbf6d@intel.com>

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