qcacmn: Fix replenish size for monitor buffers during attach

Head_pointer == Tail_pointer is treated as ring empty and
Tail_pointer + 1 == head_pointer is treated as ring full,
hence replenish count should be num_entries-1 to avoid
buffer ring treated as empty or full.

Change-Id: I157834a86380bcd2f03679510357ad3ca5550374
CRs-Fixed: 2569491
1 file changed