ASoC: msm: Add stub rx and stub tx dais

Modify Stub dai as stub rx and stub tx based on stub dai
definition. This change is required in kernel 3.10 because
two cpu dais should not have same name eventhough all
the stub dais are funcationally same

Change-Id: Iaf0945e056ee0f377559b4a506e34916c3a9a755
Signed-off-by: Vidyakumar Athota <vathota@codeaurora.org>