drm/xe: Adjust ringbuf emission for maximum possible size

MAX_JOB_SIZE_DW seems to be undersized. For the worst case emission from
 __emit_job_gen12_render_compute I hand count 57 dwords so lets bump this
to an even 58.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Reviewed-by: Francois Dugast <francois.dugast@intel.com>
Link: https://lore.kernel.org/r/20250403190317.6064-2-tvrtko.ursulin@igalia.com


Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>