media: i2c: adv748x: select V4L2_FWNODE

Building adv748x fails now unless V4L2_FWNODE is selected:

drivers/media/i2c/adv748x/adv748x-core.o: In function `adv748x_probe':
adv748x-core.c:(.text+0x1b2c): undefined reference to `v4l2_fwnode_endpoint_parse'

Fixes: 6a18865d ("media: i2c: adv748x: store number of CSI-2 lanes described in device tree")

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>