media: staging: atomisp: Use module_i2c_driver() macro

This is done using coccinelle semantic patch:

//<smpl>
@a@
identifier f, x;
@@
-static f(...) { return i2c_add_driver(&x); }

@b depends on a@
identifier e, a.x;
@@
-static e(...) { i2c_del_driver(&x); }

@c depends on a && b@
identifier a.f;
declarer name module_init;
@@
-module_init(f);

@d depends on a && b && c@
identifier b.e, a.x;
declarer name module_exit;
declarer name module_i2c_driver;
@@
-module_exit(e);
+module_i2c_driver(x);
//</smpl>

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>