[media] staging/media/solo6x10: use module_pci_driver macro

the driver duplicates the module_pci_driver code,
how?
	module_pci_driver is used for those drivers whose
	init and exit paths does only register and unregister
	to pci API and nothing else.

so use the module_pci_driver macro instead

Signed-off-by: Devendra Naga <devendra.aaru@gmail.com>
Acked-by: Ismael Luceno <ismael.luceno@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>