Do not enable the video sw generator if a real camera is present. This helps to save some spaces and to avoid unrelated code going into the built image.
If the real camera presents, there will be a warning which cannot be avoided:
`warning: VIDEO_SW_GENERATOR (defined at drivers/video/Kconfig.sw_generator:8) was assigned the value 'y' but got the value 'n'
Commit titile should be changed to "drivers: video: sw_generator: Disable the driver if a real camera presents" as this affects only the video sw generator driver"
Do not enable the video sw generator if a real camera is present. This helps to save some spaces and to avoid unrelated code going into the built image.
If the real camera presents, there will be a warning which cannot be avoided: `warning: VIDEO_SW_GENERATOR (defined at drivers/video/Kconfig.sw_generator:8) was assigned the value 'y' but got the value 'n'