mdss: dsi_v2: verify return value from dma_cmds_tx

When driver was calling dma_cmds_tx it was not checking the return
value.

Change-Id: Ia8903b71a5162d6290a0c841a7a17409dfdddd43
Signed-off-by: Terence Hampson <thampson@codeaurora.org>
1 file changed