media: dt-bindings: nokia,smia: Use better active polarity for reset

Generally reset signal is active low on camera sensors. The example had it
high. Make it low, and use GPIO_ACTIVE_LOW in gpio.h for that.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>