!2954 spi: phytium: fix phytium_spi_irq panic on boot

Merge Pull Request from: @liu_darling 
 
phytium_spi_irq panic on boot when spi irq is triggered between request_irq and spi_master_set_devdata 
 
Link:https://gitee.com/openeuler/kernel/pulls/2954

 

Reviewed-by: Mao HongBo <maohongbo@phytium.com.cn>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>