drm/xe: Align size to PAGE_SIZE

Ensure alignment with PAGE_SIZE for the size parameter
passed to __xe_bo_create_locked()

v2: move size alignment under else condition (Lucas)

Signed-off-by: Pallavi Mishra <pallavi.mishra@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20230920213259.3458968-1-pallavi.mishra@intel.com


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