All the callers assume devm_spear_pcm_platform_register is a devm_ API, so
use devm_snd_dmaengine_pcm_register in devm_spear_pcm_platform_register.

Fixes: e1771bcf ("ASoC: SPEAr: remove custom DMA alloc compat function")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>