media: stm32: dcmipp: bytecap: remove useless cmier variable

media: stm32: dcmipp: bytecap: remove useless cmier variable

The struct dcmipp_bytecap_device embeds a cmier variable which is
actually only set once and then used in several places for interrupt
mask or interrupt enable/disable. Use the DCMIPP_CMIER_P0ALL
bitfield macro directly instead of using it through the cmier
variable.

There is also no need to mask again vcap->cmsr2 against enabled
interrupts bit since this has already been done when storing the
interrupt status into the cmsr2 variable.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>