staging: dgnc: remove redundant initialization for channel array
The channel array in board_t was initialized in dgnc_found_board() with NULL. But the channel is going to initialize in dgnc_tty_init(). So the channel array doesn't need to set NULL for initailization. Signed-off-by: NDaeseok Youn <daeseok.youn@gmail.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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