media: ipu3-cio2: Use temporary storage for struct device pointer

[ Upstream commit cfd13612 ]

Use temporary storage for struct device pointer to simplify the code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Stable-dep-of: a069f79b ("media: ipu3-cio2: Request IRQ earlier")
Signed-off-by: Sasha Levin <sashal@kernel.org>