qcacld-3.0: Add default input value for txrx statistics command

For txrx_stats command, there are two parameters are designed as
mandatory: 1st is statistics category, 2nd is mac id.

Add default value 0 for those parameters.

CRs-Fixed: 2248034
Change-Id: Ifc667e22bd78a295c3323f2b2e063f2f6ba12e8e
1 file changed