drm/xe: Rename xe_uc_init_hw to xe_uc_load_hw

It feels to me like load is closer to the intention than init_hw.

It makes the init calls slightly less confusing to me. :)

Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20250619104858.418440-24-dev@lankhorst.se


Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>