sim: support camera framework multi-instance and dynamic mounting

Allow the SIM camera/V4L2 capture framework to manage multiple
imgdata instances with dynamic mounting. This avoids cross-talk
between camera streams when multiple devices are used.

Signed-off-by: Peter Bee <bijunda@bytedance.com>

Author: Peter Bee

arch/sim/Kconfig

@@ -414,12 +414,8 @@ config SIM_CAMERA_V4L2
 
 endchoice
 
-config HOST_CAMERA_DEV_PATH
-	string "Host camera device path"
-	default "/dev/video0"
-
 config SIM_CAMERA_DEV_PATH
-	string "NuttX video device path"
+	string "NuttX video device path prefix"
 	default "/dev/video"
 
 endif