[media] fix compilation with both V4L2 and I2C as 'm'

When config options are:
CONFIG_VIDEO_DEV=y
CONFIG_VIDEO_V4L2=m
CONFIG_I2C=m

Compilation breaks, as reported by:
https://bugzilla.kernel.org/show_bug.cgi?id=55681

Before changeset 7b34be71db533f3e0cf93d53cf62d036cdb5418a,
no compilation errors occurred. However, the I2C code there at
v4l2-device was incorrectly disabled.

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

Changed files
+1 -1
drivers
media
v4l2-core
+1 -1
drivers/media/v4l2-core/Makefile
··· 10 10 videodev-objs += v4l2-compat-ioctl32.o 11 11 endif 12 12 13 - obj-$(CONFIG_VIDEO_DEV) += videodev.o 13 + obj-$(CONFIG_VIDEO_V4L2) += videodev.o 14 14 obj-$(CONFIG_VIDEO_V4L2_INT_DEVICE) += v4l2-int-device.o 15 15 obj-$(CONFIG_VIDEO_V4L2) += v4l2-common.o 16 16