[media] move i2c files into drivers/media/i2c

Move ancillary I2C drivers into drivers/media/i2c, in order to
better organize them.

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

drivers/media/pci/saa7146/Makefile

@@ -2,4 +2,4 @@ obj-$(CONFIG_VIDEO_MXB) += mxb.o
 obj-$(CONFIG_VIDEO_HEXIUM_ORION) += hexium_orion.o
 obj-$(CONFIG_VIDEO_HEXIUM_GEMINI) += hexium_gemini.o
 
-ccflags-y += -I$(srctree)/drivers/media/video
+ccflags-y += -I$(srctree)/drivers/media/i2c