spi: Modify irq request position and modify parameters

- Change irq request position to the back.
- Add temporary varilable and setting (as suggested by Mr. Andy Shevchenko)

Fixes: f62ca4e2 ("spi: Add spi driver for Sunplus SP7021")
Signed-off-by: Li-hao Kuo <lhjeff911@gmail.com>
Link: https://lore.kernel.org/r/a94e3b123773fe303221d2bd2e4ce36ffa905a1c.1644198957.git.lhjeff911@gmail.com


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