Fix OV772x build breakage by selecting V4L2_FWNODE config:

ia64-linux-ld: drivers/media/i2c/ov772x.o: in function `ov772x_probe':
ov772x.c:(.text+0x1ee2): undefined reference to `v4l2_fwnode_endpoint_alloc_parse'
ia64-linux-ld: ov772x.c:(.text+0x1f12): undefined reference to `v4l2_fwnode_endpoint_free'
ia64-linux-ld: ov772x.c:(.text+0x2212): undefined reference to `v4l2_fwnode_endpoint_alloc_parse'

Fixes: 8a10b4e3 ("media: i2c: ov772x: Parse endpoint properties")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Acked-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>