[Bugfix][T106BUG-571][AT]when sending RMII,it will have a probability of blocking

Only Configure: No
Affected branch: master
Affected module: AT
Is it affected on both ZXIC and MTK:only zxic
Self-test: Yes
Doc Update:No

Change-Id: Iebaf67104f5b8b502eae6fac9adca078da8f5ff2
1 file changed