[media] cx231xx: remove a printk warning at -avcore and at -417

drivers/media/video/cx231xx/cx231xx-avcore.c:1608: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long unsigned int’
drivers/media/video/cx231xx/cx231xx-417.c:1047: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘size_t’

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>