media: drivers: media: pci: cx18: Couple of spell fixes in the file cx18-av-core.c

s/minimze/minimize/
s/initallize/initialize/

Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>