Merge pull request opencv#23375 from mshabunin:fix-v4l-verify

cmake: fix V4L config verification conflict with OBSENSOR

Author: asmorkalov

modules/videoio/cmake/detect_obsensor.cmake

@@ -18,8 +18,8 @@ if(NOT HAVE_OBSENSOR)
       endif()
     endif()
   elseif(UNIX)
-    check_include_file(linux/videodev2.h HAVE_CAMV4L2)
-    if(HAVE_CAMV4L2)
+    check_include_file(linux/videodev2.h HAVE_CAMV4L2_OBSENSOR)
+    if(HAVE_CAMV4L2_OBSENSOR)
       set(HAVE_OBSENSOR TRUE)
       set(HAVE_OBSENSOR_V4L2 TRUE)
       ocv_add_external_target(obsensor "" "" "HAVE_OBSENSOR;HAVE_OBSENSOR_V4L2")