media: atmel: atmel-sama7g5-isc: fix ispck leftover

The ispck is not used for sama7g5 variant of the ISC.
Calls to ispck have to be removed also from module insert/removal.

Fixes: d7f26849 ("media: atmel: fix the ispck initialization")
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>