drm/xe: Stop passing user flag to xe_bo_create_user()

It's quite redundant to pass XE_BO_CREATE_USER_BIT to
xe_bo_create_user() since the only difference of that function is to
force that flag. Stop passing the flag in the few cases that were
explicitly doing so.

Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240322142702.186529-2-lucas.demarchi@intel.com


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