ASoc: msm: Avoid memory allocation failure in proxy driver.

- Allocating memory using dma_alloc_coherent is resulting
failures due to fragmentation
- Fix the issue by replacing the API with
allocate_contiguous_ebi_nomap.

CRs-fixed: 358301
Change-Id: I726623d23c0080b7207911181590fa417c3e9886
Signed-off-by: Jayasena Sangaraboina <jsanga@codeaurora.org>

Conflicts:

	sound/soc/msm/msm-pcm-afe.c
	sound/soc/msm/msm-pcm-afe.h