ASoC: cygnus: Remove unused declarations

Commit a6ee05d94e8f ("ASoC: cygnus: Add Cygnus audio DAI driver")
declared but never implemented these.

Signed-off-by: Yue Haibing <yuehaibing@huawei.com
Link: https://lore.kernel.org/r/20230811110021.31656-1-yuehaibing@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org

treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_30.RULE (part 2)

Based on the normalized pattern:

this program is free software you can redistribute it and/or modify it
under the terms of the gnu general public license as published by the
free software foundation version 2 this program is distributed as is
without any warranty of any kind whether express or implied without
even the implied warranty of merchantability or fitness for a
particular purpose see the gnu general public license for more details

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference.

Reviewed-by: Allison Randal <allison@lohutok.net>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

ASoC: cygnus: Add Cygnus audio DAI driver

This patch adds Cygnus audio DAI driver. It supports I2S, TDM
and SPDIF modes and uses three clocks derived from PLL.

This patchset has been tested on Cygnus wireless audio
bcm958305K board.

Signed-off-by: Lori Hikichi <lhikichi@broadcom.com>
Signed-off-by: Simran Rai <ssimran@broadcom.com>
Reviewed-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Arun Parameswaran <arunp@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Mark Brown <broonie@kernel.org>