ASoC: Some issues about loongson i2s

Merge series from Binbin Zhou <zhoubinbin@loongson.cn>:

This patch set is mainly about Loongson i2s related issues.

Please allow me to briefly explain this patch set:
Patch 1-2: Add ES8323 codec required on Loongson-2K2000
Patch 3-4: Add uda1342 codec required on Loongson-2K1000
Patch 5: Fix the problem of unable to detect codec under FDT system.
Patch 6-7: Add Loongson i2s platform device support