staging: dgnc: removes read_cnt, real_raw, rawreadok and buf
This patch removes the use of read_cnt, real_raw, buf and rawreadok. The variable buf is never used in the code. The variables rawreadok read_cnt and real_raw don't exist in the new API. Reading the data raw is no longer supported by the tty layer. Signed-off-by: Lidza Louina <lidza.louina@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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