ASoC: rt-sdw*: add __func__ to all error logs

ASoC: rt-sdw*: add __func__ to all error logs

The drivers for Realtek SoundWire codecs use similar logs, which is
problematic to analyze problems reported by CI tools, e.g. "Failed to
get private value: 752001 => 0000 ret=-5". It's not uncommon to have
several Realtek devices on the same platform, having the same log
thrown makes support difficult.

This patch adds __func__ to all error logs which didn't already
include it.

No functionality change, only error logs are modified.

Signed-off-by: Pierre-Louis Bossart <[email protected]>
Reviewed-by: Bard Liao <[email protected]>
Link: https://msgid.link/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>