Change sn2-specific calls into generic functions.  Without this change
the uncached allocator will not work on non-sn2 platforms.
Signed-off-by: NGreg Edwards <edwardsg@sgi.com>
Signed-off-by: NMartin Hicks <mort@sgi.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>