media: atomisp: gc0310: Remove gc0310.h

Remove the gc0310.h header file, moving most of its content
into atomisp-gc0310.c and dropping some unused parts.

This brings the gc0310 sensor driver inline with other sensor
regular / non atomisp sensor drivers which usually only are
one single .c file.

Link: https://lore.kernel.org/r/20230518153214.194976-9-hdegoede@redhat.com



Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>