media: atomisp: ov2680: Rename unknown/0x370a to sensor_ctrl_0a

media: atomisp: ov2680: Rename unknown/0x370a to sensor_ctrl_0a

The data sheets say the registers at offset 0x3700 - 0x373f are
"sensor control" registers rename the unknown variable in
ov2680_set_mode() to sensor_ctrl_0a and add
a OV2680_REG_SENSOR_CTRL_0A define.

Link: https://lore.kernel.org/r/20230604161406.69369-5-hdegoede@redhat.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>