ALSA: compress_core: Deconstify copy callback buffer

The buffer passed to the copy callback should not be const because the
copy callback can be used for capture and playback.

Change-Id: I20674598b00bf933a0fe08eb77c122df6cdf3369
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Eric Laurent <elaurent@google.com>
Signed-off-by: Krishnankutty Kolathappilly <kkolat@codeaurora.org>
3 files changed