media: dt-bindings: ov5693: fix maintainer email address

Switch my mail address from a company mail to a personal one.

Signed-off-by: Tommaso Merciai <tomm.merciai@gmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>