CL: make the scratch size as a device resource attribute.

CL: make the scratch size as a device resource attribute.

Actually, the scratch size is much like the local memory size
which should be a device dependent information.

This patch is to put scratch mem size to the device attribute
structure. And when the kernel needs more than the maximum scratch
memory, we just return a out-of-resource error rather than trigger
an assertion.

Signed-off-by: Zhigang Gong <zhigang.gong@intel.com>
Reviewed-by: Song, Ruiling <ruiling.song@intel.com>