linuxtv_tuner: replace `10` with `MAX_STREAM_BUF_CNT`
linuxtv_tuner: replace `10` with `MAX_STREAM_BUF_CNT`

Signed-off-by: Michael Ira Krufky <00524723a60798c74a43fcc620c25dd7b9ece078@gmail.com>

mkrufky/libdvbtee,mkrufky/libdvbtee,mkrufky/libdvbtee,mkrufky/libdvbtee,mkrufky/libdvbtee