[PATCH 1/2 V2] staging: dgnc: ch->ch_bd is already assigned to bd variable

The bd variables in functions are already assigned from ch->ch_bd but it is not used in those functions except checking NULL. The ch->ch_bd could be replaced with bd variable. Signed-off-by: Daeseok Youn --- V2: Patches in previous series are splited but it could be

[PATCH 1/2 V2] staging: dgnc: ch->ch_bd is already assigned to bd variable

The bd variables in functions are already assigned from ch->ch_bd but it is not used in those functions except checking NULL. The ch->ch_bd could be replaced with bd variable. Signed-off-by: Daeseok Youn --- V2: Patches in previous series are splited but it could be merged into one. There are