cnss2: Call mhi_device_get_sync() if timeout requested is 0

mhi_device_get_sync() can sleep while waiting for MHI M0 event.
When timeout passed in is 0 for CNSS force wake API, call it
instead of mhi_device_get_sync_atomic() which will only do busy
wait.

Change-Id: I8ba5a3382b4104eb7324c9e7f3fc1ce3c21065f4
Signed-off-by: Yue Ma <yuem@codeaurora.org>