ASoC: amd: amd_sdw: Fix unlikely uninitialized variable use in create_sdw_dailinks()

ASoC: amd: amd_sdw: Fix unlikely uninitialized variable use in create_sdw_dailinks()

Initialize current_be_id to 0 in AMD legacy stack(NO DSP enabled) SoundWire
generic machine driver code to handle the unlikely case when there are no
devices connected to a DAI.

In this case create_sdw_dailink() would return without touching the passed
pointer to current_be_id.

Found by gcc -fanalyzer

Cc: stable@vger.kernel.org
Fixes: 2981d9b0789c4 ("ASoC: amd: acp: add soundwire machine driver for legacy stack")
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://patch.msgid.link/20250506120823.3621604-1-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>