ASoC: loongson: Fix component check failed on FDT systems

ASoC: loongson: Fix component check failed on FDT systems

[ Upstream commit a6134e7b4d4a14e0942f113a6df1d518baa2a0a4 ]

Add missing snd_soc_dai_link.platforms assignment to avoid
soc_dai_link_sanity_check() failure.

Fixes: d24028606e76 ("ASoC: loongson: Add Loongson ASoC Sound Card Support")
Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>
Link: https://patch.msgid.link/6645888f2f9e8a1d8d799109f867d0f97fd78c58.1728459624.git.zhoubinbin@loongson.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>