drm/xe/guc: Capture all available bits of GuC timestamp

The extra bits are not hugely useful because the GuC log only uses
32bit time stamps. But they exist so might as well provide them.

Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241024002554.1983101-2-John.C.Harrison@Intel.com