drivers: video: Remove dedicated sensor dir

Keep flat video driver directory for now.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index b40a4de..0e124be 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -32,6 +32,6 @@
 
 source "drivers/video/Kconfig.sw_generator"
 
-source "drivers/video/sensor/Kconfig"
+source "drivers/video/Kconfig.mt9m114"
 
 endif # VIDEO