soundwire: return error if vote for LPASS HW Core fails

Before proceeding with handling soundwire interrupt check
return value of vote for LPASS HW core and handle
error scenarios.

Change-Id: I0f19a5ddb0af82f33a8d004d008eda9baa40c036
Signed-off-by: Karthikeyan Mani <kmani@codeaurora.org>