spi: rockchip: clear interrupt status in error handler

The interrupt status bit of the previous error data transmition will
affect the next operation and cause continuous SPI transmission failure.

Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
Link: https://lore.kernel.org/r/20220216014028.8123-7-jon.lin@rock-chips.com


Signed-off-by: Mark Brown <broonie@kernel.org>