media: meye: fix missing pm_mchip_mode field

After commit 9c4a8489 ("media: meye: use generic power management")
the pm_mchip_mode field should now always be present, even if CONFIG_PM
is not set.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 9c4a8489 ("media: meye: use generic power management")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>