sn2 does early initialization of the SAL so it can use it for early console
support.  Unfortunately, the loop to find the SAL entry point was buggy so
when we tried out new EFI and SAL system table layouts, the loop didn't
terminate.  Here's the fix (doh!, use two different loop counters instead of
one and just return if we find the SAL entry point).
Signed-off-by: Jesse Barnes <jbarnes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>