[PATCH] media: i2c: ths8200 needs V4L2_ASYNC

[Randy Dunlap]

Fix the build errors reported by the kernel test robot by
selecting V4L2_ASYNC:

mips-linux-ld: drivers/media/i2c/ths8200.o: in function `ths8200_remove':
ths8200.c:(.text+0x1ec): undefined reference to `v4l2_async_unregister_subdev'
mips-linux-ld: drivers/media/i2c/ths8200.o: in function `ths8200_probe':
ths8200.c:(.text+0x404): undefined reference to `v4l2_async_register_subdev'

Fixes: ed29f89497006 ("media: i2c: ths8200: support asynchronous probing")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Cc: "Lad, Prabhakar" <prabhakar.csengg@xxxxxxxxx>
Cc: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
Cc: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Cc: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Cc: linux-media@xxxxxxxxxxxxxxx
---
 drivers/media/i2c/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- linux-next-20210903.orig/drivers/media/i2c/Kconfig
+++ linux-next-20210903/drivers/media/i2c/Kconfig
@@ -597,6 +597,7 @@ config VIDEO_AK881X
 config VIDEO_THS8200
 	tristate "Texas Instruments THS8200 video encoder"
 	depends on VIDEO_V4L2 && I2C
+	select V4L2_ASYNC
 	help
 	  Support for the Texas Instruments THS8200 video encoder.