drivers: spi: spi_csk6: motify spi async interface param

2 job 于feature/spi_async_api in 8 minute 和 20 second (queued for 1 second)
状态 作业 ID 名称 覆盖率
  Ztest
已通过 #41274
zgsz-02 generic
ztest_build_only

00:03:26

已通过 #41275
zgsz-03 with-device
ztest_device_test

00:04:53