ASoC: spacemit: fix build warning and error

Merge series from Troy Mitchell <troy.mitchell@linux.spacemit.com>:

After the i2s patch for K1 was merged, two issues were identified:
- Missing error handling for the init_dai() function [1],
  which is required since the function allocates memory internally.
- The Kconfig entry ignored the dependency chain of DMA_CMA [2].

This series fixes both issues.

Link: https://lore.kernel.org/all/aPtiNCZ_KBezL2Dr@stanley.mountain/#t
Link: https://lore.kernel.org/all/20251022141705.714b19b5@canb.auug.org.au/