cnss2: Assign one MSI for wakeup purpose

Assign 1 MSI to WLAN host driver which will be used as wakeup source
for firmware to trigger host resume. Reduce MSIs for copy engine from
12 to 11.

Change-Id: Icaa3fd8a4705151b6f21ad244bf77162a2aae830
Signed-off-by: Yue Ma <yuem@codeaurora.org>